Atoms, Isotopes and Ions

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element, consisting of protons, neutrons, and electrons.

Front

What are isotopes?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the charge of a proton?

Back

A proton has a positive charge of +1.

Front

What is the charge of a neutron?

Back

A neutron has no charge; it is neutral.

Front

What is the charge of an electron?

Back

An electron has a negative charge of -1.

Front

How do you determine the mass number of an atom?

Back

The mass number is determined by adding the number of protons and neutrons in the nucleus of the atom.

Front

What determines the identity of an atom?

Back

The identity of an atom is determined by the number of protons it contains.

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion is an atom that has gained or lost one or more electrons, resulting in a net charge.

Front

What is a bromine atom's mass number if it has 35 protons and 45 neutrons?

Back

The mass number of the bromine atom would be 80 (35 protons + 45 neutrons).

Front

What is the significance of isotopes in chemistry?

Back

Isotopes are significant in chemistry because they can have different physical properties and can be used in various applications, such as dating materials and medical imaging.