Chemistry A Review for Trimester Exam (23-24)

Front

What is a beta particle?

Back

A beta particle is a high-energy, high-speed electron or positron emitted in the radioactive decay of an atomic nucleus.

Front

What happens to an atom when it loses electrons?

Back

When an atom loses electrons, it becomes positively charged and is referred to as a cation.

Front

What is a neutron?

Back

A neutron is a subatomic particle found in the nucleus of an atom that has no electric charge.

Front

How many neutrons are in a Neon atom with an atomic number of 10 and a mass number of 20?

Back

Neon has 10 neutrons (mass number 20 - atomic number 10 = 10).

Front

What changes in an ion?

Back

In an ion, the number of electrons changes, resulting in a net charge.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the nucleus of an atom composed of?

Back

The nucleus is composed of protons and neutrons.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is an ion?

Back

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