Year 10 Chemistry Testing for Ions

Match the following definitions and descriptions

• An atom with a positive charge

• A cation

• Any charged atom

• An ion

• An atom with a negative charge

• An anion

Match the following definitions and descriptions

• An atom that has lost electrons

• An ion

• Any atom that has lost/gained electrons

• A cation

• An atom that has gained electrons

• An anion

Organise these ions into the right categories- are they cations or anions?

Groups:

(a) Cations

,

(b) Anions

• CO₃^2-

• Br^-

• Fe²⁺

• K⁺

• Na⁺

• SO₄^2-

• Cl^-

• Ca²⁺

• OH^-

• I^-

• NH₄⁺

• NO₃^-

• Cu²⁺

How many electrons have these ions gained or lost?

Groups:

(a) Gained one electron

,

(b) Gained two electrons

,

(c) Lost one electron

,

(d) Lost two electrons

• At^-

• K⁺

• Ca²⁺

• Li⁺

• Be²⁺

• Ba²⁺

• Uus^-

• Fr⁺

• Cl^-

• Ra²⁺

• I^-

• Sr²⁺

• Cs⁺

• Rb⁺

• Br^-

• Mg²⁺

• F^-

• Na⁺

Match the following metal ion with its name

• Potassium

• Cu²⁺

• Lithium

• Li⁺

• Copper

• Ca²⁺

• Calcium

• Na⁺

• Sodium

• K⁺

Match the following metal ion with the colour of its flame

• Yellow

• Cu²⁺

• Orange-red

• Li⁺

• Red/Crimson

• Ca²⁺

• Blue-green

• Na⁺

• Lilac

• K⁺

What is the formula of the ion that forms a red flame when tested?

• Lithium (Li⁺)

• Calcium (Ca²⁺)

• Potassium (K⁺)

• Sodium (Na⁺)

What is the formula of the ion that forms a red/crimson flame when tested?

• Lithium (Li⁺⁾

• Calcium (Ca²⁺)

• Potassium (K⁺)

• Sodium (Na⁺)

Which of the following ions produce a lilac flame when tested?

• Calcium

• Lithium

• Potassium

• Sodium

Which ion forms a blue-green flame when tested?

• Copper (Cu²⁺)

• Potassium (K⁺)

• Sodium (Na⁺)

• Lithium (Li⁺)