Atoms And Molecules: From Particles To Formulae

Move from particle ideas to correct chemical formulae

ScienceGrade 9Mixed10 questions20 min

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Focus question style

Section A: Core Ideas · 5 questionsSection B: Application Practice · 5 questions

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Section A: Core Ideas

Practise the first group of related skills.

Choose the best answer for each question.

Question 1

EasyQuestion

Which option correctly identifies oxygen gas, $O_2$ ?

Topic: Atoms Molecules and Compounds · Skill: Differentiate atoms molecules elements and compounds

Question 2

MediumQuestion

Which substance is a molecule of an element?

Topic: Atoms Molecules and Compounds · Skill: Differentiate molecule types

Question 3

MediumQuestion

Which property is commonly associated with ionic compounds such as sodium chloride?

Topic: Ions and Bonding · Skill: Differentiate ionic and covalent compounds

Question 4

AdvancedQuestion

Which ion is a cation?

Topic: Ions and Bonding · Skill: Differentiate cations and anions

Question 5

MediumQuestion

An atom has electronic configuration $2,8,1$ . Which ion is it most likely to form?

Topic: Ions and Bonding · Skill: Calculate ion charge from atomic number

What this assignment covers

Practise atoms, molecules, ions, valency and formula writing in a clear sequence.

Skills and sections

Differentiate atoms molecules elements and compounds, Differentiate molecule types, Differentiate ionic and covalent compounds, Differentiate cations and anions, Calculate ion charge from atomic number

Section A: Core Ideas: 5 questions
Section B: Application Practice: 5 questions