Electronic Configuration + Isotopes

Question 1

1st Shell can hold up to..
2nd shell can hold up to..
3rd shell can hold up to..

Answer 1

2,8,8

Question 2

What are isotopes

Answer 2

Isotopes are elements with the same amount of protons but different amount of neutrons

Question 3

Relative Atomic Mass formula

Answer 3

(mass number x abundance) + (mass number x abundance) /100

Question 4

Calculate the relative atomic mass of Chlorine, which is made up from 75% Chlorine-35 and 25% Chlorine-37

Answer 4

75 x 25=2625
25x37=925

2625+925=3550
3550/100=35.5

Question 5

What is the electronic configuration for Sodium

Mass number 11

Answer 5

2,8,1

Question 6

Draw the configuration of sodium

Answer 6

3 circles
2 crosses in the first one
8 crosses in the second one
1 crosses in the third one