N5 Unit 1 - Ionic Formulae

​​ ​ Categorise these atoms into the appropriate ion groups

Groups:

(a) Positively charged

,

(b) Negatively charged

• Nitrogen
• Potassium

• Iodine
• Bromine
• Copper

• Aluminum

• Fluorine
• Iron

• Chlorine
• Lead

• Phosphorus
• Arsenic
• Silver

• Beryllium

What is the formula for a magnesium ion?

• Mg+

• Mg²⁺

• Mg^2-

• Mg^-

What is the name of this ion? SO₄^2-

• sulfur tetroxide ion

• sulfonate

• sulfate

• sulfide

Which is the correct formula for an ammonium ion?

• NH₄

• NH₄^-

• NH₄²⁺

• NH₄⁺

Which of the following is the correct formula for a sodium ion?

• So⁺

• Na^-

• Na⁺

• Na²⁺

What is the formula for a nitrate ion?

• NO^-

• NO₂^-

• NO₃^-

• NO₄^-

Reorder the following steps for working out ionic formulae

• Formulae

• Swap

• Divide

• Valency/charge

• Symbols

Categorise these complex ions into the correct valency columns.

Groups:

(a) 1

,

(b) 2

,

(c) 3

• ethanoate

• hydroxide

• thiosulfate

• hydrogensulfate

• ammonium

• dichromate

• phosphate
• carbonate

What is the formula for lithium bromide?

• LiBr

• LiBr₂

• Li₂Br

• Li₂Br₂

What is the formula for iron(II) oxide?

• FeO₂

• FeO

• Fe₂O

• Fe₂O₃