The Particles That Substances Are Made Of (Grade 10 NSC Matric Physical Sciences): Quizzes

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Atoms and Compounds
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What is an atom?

Smallest unit retaining element properties

What determines the properties of different substances?

Type of atoms & their arrangement

In what ratio are atoms combined in a compound?

Definite, fixed proportions

What is the ratio of hydrogen to oxygen atoms in water?

2:1

What property do covalent molecular structures typically have?

Low melting & boiling points

How are compounds classified?

By type of bonding

Which is an example of an ionic network structure?

NaCl\text{NaCl}

If a molecular formula is C4H10\text{C}_4\text{H}_{10}, what is the empirical formula?

C2H5\text{C}_2\text{H}_5

Which model gives the best representation of molecular shape and size?

Space-filling models

In water electrolysis, which gas is produced at the positive electrode?

Oxygen

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