Question

PLEASE HELP ME I APPRECIATE IT ALL

Answer 1

1. Flourine is the third one because it has 6 valence

Sodium is the first diagram,

Phosphorus is the last one because it has 5 valence,

Magnesium is therefore the second one because it has 2 valence

2.

The first box is 0.015

second is 15

third is 150

fourth is 1.5

fifth is 0.15

Answer 2

The dot diagrams refer to the number of electrons in each atom's outermost shell.

1. Sodium
2. Magnesium
3. Phosphorus
4. Fluorine

Each 10 to the power of a positive number moves the decimal place to the right and negative to the left. 10 to the power of 0 is just 1.


1. 0.015
2. 15
3. 150
4. 1.5
5. 0.15