Neutral Atoms, Ions, and Isotopes

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

How do you calculate the number of neutrons in an isotope?

Back

Subtract the atomic number (number of protons) from the mass number.

Front

What is the charge of a Li+ ion?

Back

A Li+ ion has a positive charge due to the loss of one electron.

Front

What happens to an atom when it loses an electron?

Back

It becomes a positive ion.

Front

What is a negative ion called?

Back

A negative ion is called an anion.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

How many protons are in a neutral atom of bromine?

Back

A neutral atom of bromine has 35 protons.

Front

What is an isotope?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the relationship between protons, neutrons, and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

What defines a cation?

Back

A cation is a positively charged ion formed when an atom loses one or more electrons.