Ions

The number in the upper corner of an element tile (7 for nitrogen) is called _____.

• the proton number

• the atomic number

• the mass number

• the electron number

Tags

NGSS.HS-PS1-1

For an atom to be electrically neutral, it must contain the same number of...

• protons and neutrons

• neutrons and electrons

• protons and electrons

• nucleons and electrons

Tags

NGSS.HS-PS1-7

The nucleus of an atom contains...

• protons and neutrons

• only protons

• only neutrons

• protons and electrons

Tags

NGSS.HS-PS1-8

Which subatomic particle has a charge of -1?

• the neutron

• the electron

• the proton

An atom consists of 5 protons, 5 electrons, and 6 neutrons. What is its mass number?

• 11

• 5

• 10

• 16

Tags

NGSS.MS-PS1-1

Atoms that carry an electric charge and gain or lose electrons are called...

• negative charges

• positive charges

• isotopes

• ions

Use the picture to answer. How many electrons are in a neutral atom of gold?

• 79

• 197

• 196

• 196.967

Tags

NGSS.HS-PS1-1

When an atom loses electrons, it becomes a _____ ion.

• negative

• positive

• neutral

• sad

What charge does an ion have if it lost one electron?

• -1

• +1

Tags

NGSS.HS-PS1-7

What charge does an ion have if it gained 3 electrons?

• +3

• -3