Explanation:
Atomic numbers for neutral atoms are the same as the number of electrons. The number of electrons are used in writing the subshell notation where we can see the highest princpal quantum number(n).
In order to solve this problem, a good knowledge of the periodic table and shell notation is required.
For example;
Given a number 5;
We know the number is made of both the atomic number of the element and the highest quantum number.
It is easier for us to know the highest quantum number from the shell notation:
shell notation 1s²2s²2p¹
highest principal quantum number is 2
We are left with atomic number 5-2, which is 3
The element is therefore Li.
Part A. 5, 30, 58, 56, 99, 79, 19, 98, 9
Li Fe I Sb U Ta S Pa N
Part B. 9, 99, 30, 95, 19, 47, 79
N U Fe Ra S Mo Ta
Learn more:
s-orbital brainly.com/question/9288609
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