Artificial products, medicines, and fertilizers are examples of chemistry discoveries that have had the greatest impact on the modern world. Polymer discovery has resulted in all the plastics and synthetic fabrics that surround us today.
What is the importance of research in chemistry?Understanding how the properties of substances are related to their molecular structures allows chemists to design new molecules and materials with the desired properties, as well as develop or invent new types of transformations for carrying out the syntheses of these substances.
Chemistry is used in almost every aspect of today's automobiles, from the exterior paint, bumpers, and headlights to the interior seats, dashboard components, and seatbelts and airbags that protect passengers.
To name a few, industrial applications of chemistry have a direct impact on our daily lives: what we eat, what we wear, how we travel, the technology we use, how we treat illnesses, and how we get electricity. Chemistry research is constantly deepening our understanding and leading to new discoveries.
To learn more about the research in chemistry, follow the link;
https://brainly.com/question/3628862
#SPJ6
How are elements arranged on the periodic table?
a. they are arranged to highlight similarities between elements
b. they are arranged to highlight different elements with similar isotopes
c. they are arranged in order from most abundant to very rare and unstable
d. they are arranged in order of the date of discovery
Answer:
the elements are listed in order of increasing atomic number. The atomic number is the number of protons in the nucleus of an atom.In a periodic table arranged in order of increasing atomic number, elements having similar chemical properties naturally line up in the same column.
The elements on the periodic table are arranged on the basis of highlighting similarities between elements. Thus, the correct option for this question is A.
How elements are arranged on the periodic table?The elements on the periodic table are basically arranged on the basis of increasing their atomic number. These atomic number is represented by the number of protons in the nucleus of an element.
According to the question, the elements possessing identical chemical properties are arranged in the same group. For example, group 17 is known as the halogen group. Among this group, the elements bear one electron short to fulfill their octet.
The whole periodic table comprises of 18 groups and 7 periods.
Therefore, the elements on the periodic table are arranged on the basis of highlighting similarities between elements. Thus, the correct option for this question is A.
To learn more about the Periodic table, refer to the link:
https://brainly.com/question/15987580
#SPJ2
PLS HELP. DUE TODAY.
1. T or F? All protons in an element contain an identical number of neutrons.
2. An atom with a _____ charge has the same number of protons and electrons.
Answer:
1. falseno all protons in an element doesn't contain an identical number of neutrons . number of electrons and number of protons contain identical number but the number of neutrons may vary. for eg: protons and neutrons of hydrogen is 1 and 0 respectively whereas protons and neutrons of helium is 2 and 2 .
2.neutral chargeWhat would the car weigh on Earth with a gravitational pull of 9.8 N/kg?
Answer:
Explanation:s the gravitational field strength on Earth's 9.8 N kg?
The gravitational field strength of the Earth is 10 N/kg (10 newtons per kilogram).
Distillation can be separated in what technique?
A. Chemical
B. Physical
Answer:
B. Physical process is the way distillation can be separated.
what is electron configuration?
Answer:
electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals.
Which of the following best describes a scientific model?
Question 6 options:
Something used to represent an idea or process
A way to prove a theory is true
A direct experience in nature
A prediction that can be tested
Explanation:
idea= hypothesis
xperience in nature= read Darwin's theory..
with birds from Galapagos island or rain forest environment., had proven that the shape of a bird's beaks, determined what their diet consisted of In the wild.
captured birds from such countries, has proven, an omnivore or seed eater...through testing plus dissection.
Nguyên tố hoá học là gì
Nguyên tố hóa học, thường được gọi đơn giản là nguyên tố, là một chất hóa học tinh khiết, bao gồm một kiểu nguyên tử, được phân biệt bởi số hiệu nguyên tử, là số lượng proton có trong mỗi hạt nhân.
Hope U like my answer and my answer helped U......
Which statement best explains why hydrogen's atomic number is equal to its mass? (1 point)
O Hydrogen is in the first row and the first column of the periodic table.
O Hydrogen has one electron and one proton.
O Hydrogen does not have any neutrons.
O Hydrogen is stable, with two electrons in its outer shell.
We have that The Mass atomic number is equal to its mass number of Hydrogen because it bears no Neutrons .
The Mass atomic number is equal to its mass number of Hydrogen because it bears no Neutrons .The Hydrogen atom is devoid of any neutron.The hydrogen atom is made up of one electron and one proton.
For more information on this visit
https://brainly.com/question/4408975?referrer=searchResults
Answer:
1. A mental can be hammered into thin sheets and nonmetals are brittle
2. C vanadium
3. C silicon
4. B hydrogen does not have neutron
5. B francium has few valence electrons but they are in a higher energy level
annnoymousheyy avatar
6. A.
protons = 31
neutron = 39
electron = 28
7. C isotopes that are naturally occurring and unstable always exist in trace amount
8. C atomic number
9. B electrons move freely in curved paths around the nucleus
10. A low energy alpha particles passing through a field of high mass number particles
annnoymousheyy avatar
11. C on the right side of the periodic table
12. A nitrogen
13. A fluorine , chlorine , and iodine
14. C an ionic bond is likely because they will want to give away two valence electrons in order to become stable
15. D -2
annnoymousheyy avatar
16. The change in atomic number from 10 to 11
implies a change from a noble gas to a highly
reactive group 1 element. As a result of this,
reactivity increases. The atomic number of an element tells us the group to which the element belongs in the
periodic table.
annnoymousheyy avatar
An atomic number of 10 shows a filled outermost shell which is characteristic of the noble gases. Hence, as we move from this atomic number of
10 to an atomic number of 11, reactivity increases
positively. Atomic number 11 corresponds to a highly
annnoymousheyy avatar
17. The periodic table shows a correlation between the strength of the ionic connection and the position of the elements on the table. Because metals are positively charged and non-metals
annnoymousheyy avatar
are negatively charged, if you start on the left side of the periodic table and work your way right, the ionic charge and radius will gradually decrease and the charge will lessen.
To clarify, oxygen is a nonmetal with a little negative charge, whereas lithium is a metal with a positive charge
Explanation:
summarize why error is important.
Heisenberg's uncertainty principle stats that's isn't possible to know the exact momentum and _______ of a particle simultaneously. In terms of atomic structure, this means that we can't determine fixed ________ for electrons but can only determine the _________ of finding an electron in a given region of space.
Detection of nitrongen ??
Answer:
The extract is boiled with FeSO4 and acidified with concentrated H2SO4. The appearance on Prussian blue colour indicates the presence of nitrogen
Explanation:
PLS mark it brainliest
What are two factors that can change the rate of a chemical?
Answer:
the surface area of a solid reactant.
temperature.
presence/absence of a catalyst.
Most Ancient Greek philosophers discusses the world around them but did not do any experiments or make detailed observations
Answer:
Because to them it was just a little bit of fiction. so they don't really think it's necessary to do experiments or make detailed observation
Explanation:
it's just like how we presently today discuss about robot talking to us like humans but it's not yet come to pass .
In comparing groups, the first or the second, which group was more precise or was the precision the same
Comparing the data obtained online, the first group is more precise
The reason the above selection is correct is as follows;
Question: Parts of the question appear missing from a similar question online and included here;
First Group:
[tex]\begin{array}{|c|c|c|c|c|c|c|} Team \ a &Team \ b&Team \ c&Team \ d&Team \ e&Team \ f&Team \ g\\2.77 \ cm&2.60 \ cm&2.80 \ cm&2.65 \ cm&2.75 \ cm&2.65 \ cm& 2.68 \ cm\end{array}\right][/tex]
Second Group
[tex]\begin{array}{|c|c|c|c|c|c|c|} Team \ a &Team \ b&Team \ c&Team \ d&Team \ e&Team \ f&Team \ g\\2.70 \ cm&2.78 \ cm&2.62 \ cm&2.65 \ cm&2.75 \ cm&2.80 \ cm& 2.60 \ cm\end{array}\right][/tex]
Calculations for the first group:
The average = (2.77 + 2.60 + 2.80 + 2.65 + 2.75 + 2.65 + 2.68)/7 = 2.7
The range = 2.80 - 2.60 = 0.20
The approximate ± range of the average = ±0.2/2 = ±0.1
The precision of the first measurement is 2.7 ± 0.1 cm
Calculations for the second group:
The average = (2.70 + 2.78 + 2.62 + 2.65 + 2.75 + 2.80 + 2.60)/7 = 2.7
The range = 2.80 - 2.60 = 0.20
The approximate ± range from the average = ±0.2/2 = ±0.1
The range of values from the average is approximately ±0.1 cm
The precision of the first measurement is 2.7 ± 0.1 cm
Method to determine precision:
Precision is given by the finding the average deviation and the standard deviation as follows;
[tex]\mathbf{Average \ deviation} = \dfrac{\sum \left | x - \mu \right |}{n}[/tex]
[tex]\mathbf{Standard\ deviation} =\sqrt{\dfrac{\sum \left ( x - \mu \right )^2}{n}}[/tex]
Where;
μ = The mean or average = 2.7
n = The number of items (count) of the data = 7
For the first group, we have;
[tex]\mathbf{\dfrac{\sum \left | x - \mu \right |}{n}} = \dfrac{0.07 + 0.1 + 0.1 + 0.05 + 0.05 + 0.05 + 0.02 }{7} = \mathbf{0.062857}[/tex]
The average deviation of the first group = 0.062857
∑(x - μ)² ≈ 0.0328
[tex]\mathbf{The \ standard\ deviation} =\sqrt{\dfrac{0.0328}{7}} \approx \mathbf{0.068452}[/tex]
For the second group, we have;
[tex]\mathbf{\dfrac{\sum \left | x - \mu \right |}{n}} = \dfrac{0.0+ 0.08 + 0.08 + 0.05 + 0.05 + 0.1 + 0.1 }{7} = \mathbf{0.06571428571}[/tex]
∑(x - μ)² ≈ 0.0378
[tex]\mathbf{The \ standard\ deviation} =\sqrt{\dfrac{0.0378}{7}} \approx \mathbf{0.073485}[/tex]
By using the average deviation, and standard deviation values, the deviation of the second group is more than the first group and therefore the first group is more precise
Learn more about accuracy and precision here:
https://brainly.com/question/11992940
Someone plz help me :(
Answer:
B and A.
Explanation:
Many of the great scientists were religious. But the answer is not D.
A scientist may have strong opinions. That was certainly true of Newton. Most of the time he was right. Still the answer is not C. Science requires an open mind.
The answer is between A and B. Many discoveries were made looking at the natural world. That may provide the inspiration. But I don't think it is the answer. I'm going to say A
B is the other answer. Between A and B many scientific truths have been discovered.
what amount (in moles) is present in 2.0g of sodium hydroxide,NaOH
Answer: 0.050 moles of NaOH
Explanation: The molar mass of NaOH is 40.0g/mole
2.0g/40.0g/mole = 0.050 moles (2 sig fig)
What isotope will be formed by the fusion of a H-1 isotope and a H-3 isotope? Would the
product be a stable Isotope? Explain.
|
Answer:
Use the edit icon to pin, add or delete clips.
Explanation:
hfdknvd hcde
5. What is common among the following phenomena?
* Blinking of traffic light
* Rotation of blades of fan
* Swinging of pendulum of a clock
a) All are chemical changes
b) All are periodic changes
c) All are undesirable changes
d) All are irreversible changes
Answer:
All are periodic changes
[And is that a todoroki pfp, I like MHA too
(・∀・) ]
give any two reasons that hydrogen is kept in group 1 in Modern Periodic Table
Answer:
Hydrogen is usually classified as a group 1 element since it has one valence electron, just like group 1 metals.
Explanation:
the atomic number of calcium is 20 . the maximum possible numbers of electron in m-shell is a 2 b 8 c 18 d 10
Answer:
8
Explanation:
Electronic configuration of Calcium = 2, 8, 8, 2
M shell = 3rd energy level
Maximum number of shells in m shell is 8
What is the Color of trioxonitrate(v)
Answer:
it's yellowish in color plz Mark me as brainliest
Answer:
It's a yellowish color like copper
I need help on this, It’s due today. Please, anybody
Answer:
1 = 252g, 2 = 2mL, 3 = 1.5mL, 4 = 3g, 5 = 225g, 6 = 0.92g/mL, 7 = 0.75g/mL, 8 = 0.71g/mL, 9 = 1.9mL, 10= 1.11mL, 11 = 76.9g
Explanation:
This problem is testing how well you can move around the equation D = m/v where D = Density (g/mL), m= mass of sample (g), v = volume of sample (mL).
Classify the following properties of the element
silicon as chemical or physical properties:
a. blue-gray color
b. brittle
c. doesn't dissolve in water
d. melts at 1410°C
e. reacts vigorously with fluorine
We have that this how they differ
Physical properties
Blue-gray color BrittleChemical Properties
Doesn't dissolve in water Melts at 1410°C Reacts vigorously with fluorine
From the Question we are told that
Silicon properties:
a. blue-gray color
b. brittle
c. doesn't dissolve in water
d. melts at 1410°C
e. reacts vigorously with fluorine
Physical properties
This Refer to Properties that can be seen and Measured
While
Chemical Properties
This are Refers to the effect of the element in reactions
Therefore
Physical properties
Blue-gray color BrittleChemical Properties
Doesn't dissolve in water Melts at 1410°C Reacts vigorously with fluorineFor more information on this visit
https://brainly.com/question/17148237?referrer=searchResults
A dehydration reaction (or condensation reaction) is the process in which _____. See Concept 5.1 (Page) View Available Hint(s)for Part A water molecules are produced as a polymer is formed from monomers the bonds between the individual monomers of a polymer are broken by the addition of water molecules water molecules are attracted to each other water molecules are used as a source of raw material to break down polymers to monomers None of the choices is correct.
A dehydration reaction (or condensation reaction) is the process in which water molecules are produced as a polymer is formed from monomers.
A chemical reaction is the process by which substances called reactants are transformed to another substance known as products through the breaking up or building up of bonds between the reactants.
There are different types of chemicals reaction which includes condensation reaction.
Condensation reaction involves the combination of two smaller molecules known as monomers to for one larger molecule known as polymer with the loss of water molecule.
Condensation reaction is specifically called dehydration reaction due to the loss of water molecule that is involved.
Therefore, a dehydration reaction (or condensation reaction) is the process in which water molecules are produced as a polymer is formed from monomers.
Learn more here:
https://brainly.com/question/20300284
anyone know valency of phosphide and phosphite please tell me and also they are not same .If you know can i get their symbol too please
i found this. there's more coming up
How does water vapor in the air change state below the freezing point
Answer:
Water vapor molecules in the air near the can cooled when energy from the air transferred to the cold can. These water molecules slowed down, condensed to liquid water, and then froze to become ice. Your can might have some water and some ice on the outside of it.
Explanation:
Why does the author include information about bread and sandwich wrappings in the article?
(A) to show that the scientific method is often used to understand things about food
(B) to provide an example of something that can be tested by the scientific method
(C) to demonstrate the problems that can be caused by improper seals and wrappings
(D) to help evaluate how the weight of bread can show how much moisture it has
Answer:
what is the story about actually.i think it's from ur lesson
Explanation:
certain breads mold easily...(fact)..
especially white bread., when exposed to any moisture, from refrigeration, or freezing..
when taken out of (cold environment), humidity in air causes molding because you take it from cold to/warm environment.
check expiration dates, keep refrigerated, and inspect 4 molding. Companies like WMART, buy in bulk, when on shelf, defrosts,, then has molding within expiration dates..
during the interconversion of state of matter, mass undergoes and change? true or false
True.
The Mass Undergoes change only in ( Solid state to liquid state ) Ice Cube to Water .
Mass changes from mg to litre.
[tex]\huge\mathfrak\red{hope \: it \: helps}[/tex]
A car start from rest and covers distance of 100m after 10seconds.if the acceleration is 2m/s square, calculate the final velocity..
Answer:
20 m/s
Explanation:
solution,
initial velocity (u)=0 m/s
Distance covered(s)=100m
Time taken(t)=10 seconds
Acceleration (a)=2m/s²
Now,
By using first equation of motion, we have
v=u+at
=0+2×10
=20 m/s
I hope it helped U
stay safe stay happy
Which statement about metals and nonmetals is correct? (1 point)
O Metals and nonmetals can both be found in any column of the periodic table.
O Most metals are a solid under normal conditions, and most nonmetals are a liquid.
O Metals tend to be poor conductors of electricity, while nonmetals are strong conductors of electricity.
O Metals can be hammered into thin sheets, and nonmetals are brittle
Answer:
The answer is the 4th one
The statement about metals and nonmetals that is correct is: "The Metals can be hammered into thin sheets, and nonmetals are brittle."
Metals are found mostly towards the left hand side of the periodic table. Non-metal character increases as you move towards the right hand side of the table.
One common property of metals is that they are malleable; this means that they can be hammered into sheets while a common property of nonmetals is that most of them are brittle.
Learn more: https://brainly.com/question/10714037
