Answer:
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Explanation:
Hey there!
This atom has 10 protons.
If this atom has an atomic mass of 22, that means the sum of protons and neutrons is 22.
p + n = 22
p = 10
Which makes this true:
10 + n = 22
Subtract 10 from each side to solve for n, the number of neutrons.
n = 12
An atom that has the atomic number of 10 and an atomic mass of 22 has 12 neutrons.
Hope this helps!
Answer:Use the K L M N shell orbit
Explanation: Valence electrons are those electrons on the outermost shell of an atomic nucleus.
The K L M N electron shell is named by a spectroscopist called Charles G. Barkla, who discovered the A X-rays ( high energy rays) and the B X-rays ( low energy rays), he later renamed the A X-rays K X-rays which is the Energy level orbit, and the B X-rays was also renamed to be the L M N and so on.
PLEASE SEE PICTURE ATTACHED
THE PICTURE SHOWS HOW TO DETERMINE VALENCE ELECTRON USING THE As AND B's WHICH ARE THE K L M N SHELL ORBIT, USING SILICON AS AN EXAMPLE.
The maximum number of electron in the K orbit is 2
The maximum number of electron in the L M N shell is 8
Therefore the number of electron found in the outermost shell becomes the number of Valence electron in that element.
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