Atomic Structure and Particles

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 are the three main subatomic particles of an atom?

Back

Electrons, protons, and neutrons.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

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.

Front

How do you calculate the mass number of an atom?

Back

The mass number is the sum of the number of protons and neutrons in the nucleus.

Front

What is the mass number of silicon?

Back

The mass number of silicon is typically around 28.

Front

What is the significance of the atomic number in the periodic table?

Back

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

Front

What is an ion?

Back

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

Front

What is the charge of an atom with 3 protons and 2 electrons?

Back

+1 (the atom is positively charged).