Formula and equations - 2.3 - (1)

Question 1

How do atoms achieve the same electron structure as the nearest noble gas, helium (He) to radon (Rn)?

Answer 1

by losing or gaining electrons

Question 2

What do atoms of metals on the left of the periodic table lose to form cations (positive ions)?

Answer 2

electrons

Question 3

What do atoms of non-metals on the right of the periodic table gain to form anions (negative ions)?

Answer 3

electrons

Question 4

For many elements, what can you use to work out the likely charge on the ion?

Answer 4

the element’s position in the periodic table

Question 5

What can some metals, mostly transition metals, form?

Answer 5

several ions with different charges

Question 6

How is the ionic charge shown?

Answer 6

with a Roman numeral in the name of the ion

Question 7

What does a binary compound contain?

Answer 7

two elements only

Question 8

To name a binary compound, what do you need to do?

Answer 8

use the name of the first element but change the ending of the second element’s name to -ide

Question 9

For ionic compounds, what always comes first?

Answer 9

the metal ion

Question 10

Example: sodium and oxygen form…

Answer 10

sodium oxide