Front

What is the atomic number of an element?

Back

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

Front

Which element has 7 electrons?

Back

Nitrogen (N) has 7 electrons.

Front

What is the charge of a calcium (Ca) atom when bonded with oxygen (O)?

Back

The charge would be +2.

Front

What is a proton?

Back

A proton is a subatomic particle that has a positive charge and is found in the nucleus of an atom.

Front

What is an electron?

Back

An electron is a subatomic particle that has a negative charge and is found outside the nucleus.

Front

What is a neutron?

Back

A neutron is a subatomic particle that has no charge (neutral) and is found in the nucleus of an atom.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while atomic number is the number of protons in the nucleus.

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is the role of electrons in chemical bonding?

Back

Electrons are involved in forming bonds between atoms, either by sharing (covalent bonds) or transferring (ionic bonds).

Front

What is a chemical bond?

Back

A chemical bond is a lasting attraction between atoms that enables the formation of chemical compounds.