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Keith_Richards [23]
10 months ago
13

Why does atomic radius increase across Period 3?

Chemistry
1 answer:
bezimeni [28]10 months ago
3 0

An atomic radius decrease across Period 3 because the number of shells not increases but the number of electron increases and the atomic size decreases as the effective nuclear charge increases.

When we move in the period 3 from left to the right the atomic radius decreases because of the reason that the the number of shells don not change they will remain the same across the period but the number of the electron will increases . the effective nuclear charge will also increases. the nucleus will attract the electrons more strongly that the reason the atomic radius decreases.

Thus, number of electron increases and the number of shells will remain same , the atomic size decreases as the effective nuclear charge increases.

To learn more about atomic radius here

brainly.com/question/6814005

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What is the energy of a radio wave whose frequency is 6.2 x 106 Hz?
slava [35]

Answer:

657.2 Hz

Explanation:

7 0
2 years ago
A neutral atom has an atomic number of 20 and a mass number of 41; how many protons, neutrons, and electrons are found within th
djverab [1.8K]
•The atomic number of an atom is the number of protons it has. If the atomic number is 20 then we know the atom has 20 protons.

•The mass number of an atom is the total number of protons and neutrons the atom contains. The mass number is 41 and the number of protons is 20, just subtract 20 from 41 and you will get the number of neutrons: 41 - 20= 21. The atoms has 21 neutrons.

•The number of electrons found in an atom is equal to the number of protons. The atoms has 20 protons which means it has 20 electrons.

So, the answer is:
B) 20 protons, 20 electrons, and 21 neutrons
3 0
3 years ago
Hydrogen has three isotopes 1H, 2H, and 3H. What is the difference between these three isotopes?
Leona [35]
The main difference between the 3 isotopes of hydrogen are the number of neutrons in the nucleus. Hydrogen has no neutrons, Deuterium has one neutron, and tritium has two neutrons. All three have one proton and one electron.
4 0
2 years ago
The best way to explain the relationships in a nuclear reaction is by using:
denis23 [38]
The best and most correct answer among the choices provided by your question is all of the above.

All of the choices given are the best ways to explain a nuclear reaction.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
7 0
3 years ago
Read 2 more answers
For the following example, list the given and unknown information (including gratis or moles)
Setler79 [48]

Answer:

9.6 moles O2

Explanation:

I'll assume it is 345 grams, not gratis, of water.  Hydrogen's molar mass is 1.01, not 101.

The molar mass of water is 18.0 grams/mole.

Therefore:  (345g)/(18.0 g/mole) = 19.17 or 19.2 moles water (3 sig figs).

The balanced equation states that:  2H20 ⇒ 2H2 +02

It promises that we'll get 1 mole of oxygen for every 2 moles of H2O, a molar ratio of 1/2.

get (1 mole O2/2 moles H2O)*(19.2 moles H2O) or 9.6 moles O2

6 0
2 years ago
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