5.1.1a Structure of the atom and ions

This question is about atoms and radioactivity.

Complete the descriptions below with the correct names of the subatomic particles.

The central nucleus of an atom contains uncharged (i) .................... and positively charged (ii) .................... .
A neutral atom has no overall charge because the positive charge of the nucleus is balanced by the negative (iii) .................... orbiting it.

[3]

Atoms of the same element can have different forms. For example, Carbon-12 and Carbon-14 are isotopes. Explain what is meant by the term isotopes.

[2]

$α\alpha$ -particles, $β−\beta^-$ -particles, and $γ\gamma$ -rays are three types of radiation emitted from unstable nuclei.

Complete the table by placing one tick ( $✓\checkmark$ ) in each column to associate each property with the correct type of radiation.

	positively charged	stopped by a few millimetres of aluminium	least ionising
$α\alpha$ -particle
$β−\beta^-$ -particle
$γ\gamma$ -ray

[3]

This question is about atoms and radioactivity.

Complete the descriptions below with the correct names of the subatomic particles.

The central nucleus of an atom contains uncharged (i) .................... and positively charged (ii) .................... .
A neutral atom has no overall charge because the positive charge of the nucleus is balanced by the negative (iii) .................... orbiting it.

[3]

Atoms of the same element can have different forms. For example, Carbon-12 and Carbon-14 are isotopes. Explain what is meant by the term isotopes.

[2]

$α\alpha$ -particles, $β−\beta^-$ -particles, and $γ\gamma$ -rays are three types of radiation emitted from unstable nuclei.

Complete the table by placing one tick ( $✓\checkmark$ ) in each column to associate each property with the correct type of radiation.

	positively charged	stopped by a few millimetres of aluminium	least ionising
$α\alpha$ -particle
$β−\beta^-$ -particle
$γ\gamma$ -ray

5.1.1a Structure of the atom and ions Questions