Ions and electron configuration

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 charge of a sodium ion (Na⁺¹)?

Back

The charge of a sodium ion (Na⁺¹) is +1.

Front

How many electrons does a sodium ion (Na⁺¹) have?

Back

A sodium ion (Na⁺¹) has 10 electrons.

Front

What happens to an atom when it gains an electron?

Back

When an atom gains an electron, it becomes negatively charged and is called an anion.

Front

What is the charge of an atom that has gained one electron?

Back

The charge of an atom that has gained one electron is -1.

Front

What happens to an atom when it loses an electron?

Back

When an atom loses an electron, it becomes positively charged and is called a cation.

Front

What is the charge of an atom that has lost one electron?

Back

The charge of an atom that has lost one electron is +1.

Front

What is electron configuration?

Back

Electron configuration is the distribution of electrons in an atom's orbitals.

Front

What is the electron configuration of a neutral sodium atom?

Back

The electron configuration of a neutral sodium atom is 1s²2s²2p⁶3s¹.

Front

How many valence electrons does an atom with the configuration 1s²2s²2p⁶ have?

Back

An atom with the configuration 1s²2s²2p⁶ has 8 valence electrons.