N5 Unit 1 - Ionic Formulae

​​ ​ Categorise these atoms into the appropriate ion groups

Groups:

(a) Positively charged

,

(b) Negatively charged

• Potassium

• Iron

• Nitrogen
• Iodine
• Aluminum

• Lead

• Beryllium

• Copper

• Fluorine
• Chlorine
• Arsenic
• Silver

• Phosphorus
• Bromine

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

• Symbols

• Swap

• Formulae

• Valency/charge

• Divide

Categorise these complex ions into the correct valency columns.

Groups:

(a) 1

,

(b) 2

,

(c) 3

• hydrogensulfate

• dichromate

• thiosulfate

• phosphate
• ethanoate

• ammonium

• carbonate
• hydroxide

What is the formula for lithium bromide?

• LiBr

• LiBr₂

• Li₂Br

• Li₂Br₂

What is the formula for iron(II) oxide?

• FeO₂

• FeO

• Fe₂O

• Fe₂O₃