Introduction to Atoms

Front

What is the charge of protons in an atom?

Back

Protons have a positive charge.

Front

What is the charge of electrons in an atom?

Back

Electrons have a negative charge.

Front

What is the atomic mass of an atom?

Back

The atomic mass is the total number of protons and neutrons in 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

How do you calculate the mass number of an atom?

Back

The mass number is calculated by adding the number of protons and neutrons.

Front

What is the role of neutrons in an atom?

Back

Neutrons help stabilize the nucleus and contribute to the atomic mass.

Front

What is the difference between atomic number and mass number?

Back

The atomic number is the number of protons in an atom, while the mass number is the total number of protons and neutrons.

Front

What is an ion?

Back

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

Front

What is the significance of the atomic number?

Back

The atomic number determines the identity of an element and its position in the periodic table.

Front

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

Back

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