IS3 - Atoms, Ions and Isotopes

Front

What is the charge of an atom with 12 protons and 10 electrons?

Back

The charge is +2 (12 protons - 10 electrons = +2).

Front

Define an ion.

Back

An ion is a charged atom formed by the loss or gain of electrons.

Front

What is the mass number of an atom with 15 protons and 16 neutrons?

Back

The mass number is 31 (15 protons + 16 neutrons = 31).

Front

How do you calculate the mass number of an atom?

Back

Mass number = protons + neutrons.

Front

How do you calculate the charge of an atom?

Back

Charge = protons - electrons.

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion has a charge due to the loss or gain of electrons.

Front

What are isotopes?

Back

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

Front

How many electrons does a neutral magnesium atom have if it has 12 protons?

Back

A neutral magnesium atom has 12 electrons.

Front

What is the significance of the atomic number?

Back

The atomic number indicates the number of protons in an atom and defines the element.

Front

If an atom has 10 protons and 12 neutrons, what is its mass number?

Back

The mass number is 22 (10 protons + 12 neutrons = 22).