Year 9 Chemistry

Front

What are the positive particles of an atom?

Back

Protons are the positive particles found in the nucleus of an atom.

Front

What charge does an atom have after losing one electron?

Back

+1 (The atom becomes positively charged when it loses an electron).

Front

How many neutrons are in the potassium (K) atom?

Back

Potassium (K) has 20 neutrons.

Front

What does the toxicity of a substance refer to?

Back

The toxicity of a substance refers to how it affects your health.

Front

What happens when an atom gains a valence electron?

Back

When an atom gains a valence electron, it becomes a negative ion.

Front

What are electrons?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is the charge of a neutron?

Back

Neutrons have no charge; they are neutral particles.

Front

What is a valence electron?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.