Atoms and Elements Assessment

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

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

Which element has atomic number 7?

Back

Nitrogen.

Front

Which element has atomic number 20?

Back

Calcium.

Front

What is the center of an atom called?

Back

The nucleus.

Front

What charge does a neutron have?

Back

A neutron has a neutral charge.

Front

What are protons?

Back

Protons are positively charged subatomic particles found in the nucleus of an atom.

Front

What are electrons?

Back

Electrons are negatively charged subatomic particles that orbit the nucleus of an atom.

Front

What is the mass of a neutron compared to a proton?

Back

A neutron has approximately the same mass as a proton.

Front

What is the role of electrons in an atom?

Back

Electrons are involved in chemical bonding and determine the atom's reactivity.