2.2.4 Quiz: The Periodic TableQuestion 3 of 10
2. Points
How is hydrogen in heavy water different from hydrogen in normal water?
A. The hydrogen atoms in heavy water have a neutron in the nucleus,
doubling the mass.
B. The hydrogen atoms in heavy water have an extra proton in the
nucleus.
O
C. The hydrogen in heavy water is radioactive.
O
D. The heavy water molecules contain 3 hydrogen atoms instead of

Answers

Answer 1

Answer:

Hydrogen in heavy water different from hydrogen in normal water as the hydrogen atoms in heavy water have a neutron in the nucleus,doubling the mass.

What is an atom?

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

Learn more about atom,here:

brainly.com/question/13654549

#SPJ2

Answer 2

Answer:

Answer:

Explanation:

Heavy water (deuterium oxide, 2

2O, D

2O) is a form of water that contains a larger than normal amount of the hydrogen isotope deuterium (2

H or D, also known as heavy hydrogen), rather than the common hydrogen-1 isotope (1

H or H, also called protium) that makes up most of the hydrogen in normal water.[4] The presence of deuterium gives the water different nuclear properties, and the increase of mass gives it slightly different physical and chemical properties when compared to normal water. It can be used to create ice and snow at higher temperatures since its melting point is 3.82 C.

Related Questions

Sodium reacts with oxygen to produce sodium oxide.4Na(s) + O2(g) - - 2Na2O(s) a. How many grams of Na20 are produced when 57.5 g of Na reacts ? b. If you have 18.0 g of Na, how many grams of O2 are required for reaction? c. How many grams of O2 are needed in a reaction that produces 75.0 g of Na2O?
You have probably noticed that some liquids, such as honey and molasses, flow slowly at room temperature. How does heating affect flow rate?
Beginning with an explanation of gravity's effect on a nebula, explain how we humans owe our existence to gravity.
Why is water considered a renewable resource?
If a base is added to water, what will occur?hydronium ion concentration is increased.hydroxide ion concentration is decreased.[H+] is decreased.[OH-] is decreased.

Which requires more energy to move an electron? from n = 3 to n = 4
from n = 2 to n = 3
from n = 1 to n = 2

Answers

Answer:

From n=1 to n=2

Explanation:

Electrons in n=1 are strongly attracted to the nucleus and therefore will require great force to overcome the electrostatic force of attraction to displace them from the energy level to another.

The electrostatic force reduces as you progress to the outer energy levels.

Answer:

C. from n = 1 to n = 2

Explanation:

$\Delta E=E_(final)-E_(initial)$

$\Delta E=-1312[(1)/((n_f^2 ))-\frac {1}{(n_i^2 )}]KJ mol^(-1)$

$\Delta E=-1312[(1)/((4^2 ))-\frac {1}{(3^2 )}]KJ mol^(-1)$

$\Delta E=-1312[(1)/((16 ))-\frac {1}{(9)}]KJ mol^(-1)$

$\Delta E=-1312[0.0625-0.111]KJ mol^(-1)$

$\Delta E=64 KJ mol^(-1)$

$\Delta E=E_(final)-E_(initial)$

$\Delta E=-1312[(1)/((n_f^2 ))-\frac {1}{(n_i^2 )}]KJ mol^(-1)$

$\Delta E=-1312[(1)/((3^2 ))-\frac {1}{(2^2 )}]KJ mol^(-1)$

$\Delta E=-1312[(1)/((9 ))-\frac {1}{(4)}]KJ mol^(-1)$

$\Delta E=-1312[0.111-0.25]KJ mol^(-1)$

$\Delta E=182 KJ mol^(-1)$

$\Delta E=E_(final)-E_(initial)$

$\Delta E=-1312[(1)/((n_f^2 ))-\frac {1}{(n_i^2 )}]KJ mol^(-1)$

$\Delta E=-1312[(1)/((2^2 ))-\frac {1}{(1^2 )}]KJ mol^(-1)$

$\Delta E=-1312[(1)/((4))-\frac {1}{(1)}]KJ mol^(-1)$

$\Delta E=-1312[0.25-1]KJ mol^(-1)$

$\Delta E=984 KJ mol^(-1)$

What is a rock made out of shells and corals cemented together

Answers

A rock made out of shells and corals cemented together is called a limestone.

A rock is a naturally occurring solid substance composed of one or more minerals or mineraloids.

Limestone is a sedimentary rock that is composed mainly of calcium carbonate ( $\rm CaCO_3$ ) in the form of the mineral calcite.
Limestone forms from the accumulation of shells, coral, and other debris that have been deposited on the bottom of bodies of water such as oceans, lakes, and rivers.
Over time, the weight of the overlying sediment compacts and cements the shells and other debris together to form solid rock.

Therefore, a limestone is a rock formed by the cementation of shells and corals.

Learn more about rock here:

brainly.com/question/29898401

#SPJ6

the answer is a sedimentary rock. It consist of loosely-consolidated fragments of shells and/or coral.

Students are able to introduce a sample of gas into a chamber with a moveable wall, allowing them to change the size of the portion of the chamber occupied by the gas. When the volume of the gas is reduced, what change in property would be the most reasonable to expect? a.)the temperature will decrease
b.)the pressure will decrease c.) the pressure will increase d.) the density will decrease

Answers

Final answer:

The pressure will increase. The correct option is (C).

Explanation:

The most reasonable change in property to expect when the volume of the gas is reduced is the pressure will increase.

This relationship between pressure and volume is described by Boyle's law, which states that when the volume of a gas decreases at constant temperature, the pressure of the gas increases.

This is because reducing the volume of the chamber decreases the space available for the gas particles to move, leading to more frequent collisions with the walls and an increase in pressure.

Therefore, as the volume of the gas is reduced in the chamber, the pressure will increase.

Learn more about pressure and volume relationship here:

brainly.com/question/31735835

#SPJ2

Answer:b

Explanation:

if your doing it on stemscopes

5 examples of a combustion reactions.

Answers

1.) C2H6 + O2 ---> CO2 + H2O
2.) CH4 + O2 ---> CO2 + H2O
3.) C6H12O6 + O2 ---> CO2 + H2O
4.) C2H5OH + O2 ---> CO2 + H2O

(The numbers are the little tiny 2's or 3's next to the letters!)

_____________ can be described as the ‘skin’ on the surface of a liquid due to its cohesive forces.

Answers

Answer:

surface tension

Explanation:

Surface tension

Explanation- Surface tension could be defined as the property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of the water molecules.

Lactic acid and energy is produced in muscle cells duringa) aerobic respiration
b) cellular respiration
c) anaerobic respiration
d) cellular division

Answers

It's C anaerobic respiration

Other Questions

HELPPPP.. NEED AN ANSWER SOON.. DBA IN 10 MIN FOR CHEMISTRY How do you preserve the accuracy and precision of your measurements when doing calculations with the measurements?Use dimensional analysis to find the number of cm/min in 5.8 m/hr. Show your work. Be sure to calculate the answer in the correct number of significant figures.

What should be the effect of losing ones sight on the ability to digest food

What happens to water once it reaches earths surface?

A 93-L sample of dry air is cooled from 145 oC to -22 oC at a constant pressure of 2.85 atmospheres). What is the final volume?