Elctron Arrangement

Question 1

What is the maximum number of electrons on the inner shell?

Answer 1

2

Question 2

What is the maximum number of electrons on the shells working outwards from the inner shell? List up to 3 more shells.

Answer 2

8, 8, 16

Question 3

What is the rule for drawing electrons?

Answer 3

Always start at the top and continue the pattern going to the bottom, then right and then left. You can do it in the formation North, South, East, West.

Question 4

On a piece of paper draw an atom with 16 electrons.

Answer 4

2 electrons on inner shell
8 electrons on the next shell
6 electrons on the outer shell

Question 5

The period number of an element tells us how many …….. it has

Answer 5

shells

Question 6

The group number of an element tells us how many …….. there are.

Answer 6

outer-shell electrons

Question 7

An element is in group 1. How many outer-shell electrons does it have?

Answer 7

1

Question 8

An element is in period 4. How many shells does it have?

Answer 8

4

Question 9

An element is in Group 2, Period 3. Find:
a) how many outer-shell electrons it has
b) how many shells it has
c) what the element is

Answer 9

a) 2
b) 3
c) magnesium

Question 10

What do you notice about the electron arrangement of:
a) atoms in the same group?
b) atoms in the same period?

Answer 10

a) Same number of outer-shell electrons
b) Same number of shells

Question 11

What unique feature do the elements of group 0 have to do with their electron arrangement?

Answer 11

All the elements in group 0 have the maximum amount of electrons needed to fill up the shells completely.