Section 4.2: The Structure of an Atom

What are the 3 subatomic particles in an atom (choose 3)?

• electrons

• neutrons

• cryotron

• protons

A proton has a negative charge.

• True

• False

A proton has a positive charge.

• True

• False

Tags

NGSS.MS-PS2-5

Which subatomic particle has no charge?

• Proton

• Neutron

• Electron

The ________ of an element equals the number of protons in an atom of that element.

• Mass Number

• Atomic Number

• Isotope Number

• Neutrons

Because atoms are neutral, the numbers of which 2 subatomic particles are the same?

• protons and neutrons

• neutrons and electrons

• protons and electrons

The ________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.

• Mass Number

• Atomic Number

• Electrons

• Neutrons

Isotopes of an element have the same atomic number but different mass numbers because they have different numbers of neutrons.

• True

• False

Oxygen-16 and Oxygen-17 have different mass numbers because they have different numbers of neutrons.

• True

• False

Water that contains hydrogen-2 atoms in place of hydrogen-1 atoms is called ________________.

• massive water

• heavy water

• hefty water

• hard water

Tags

NGSS.HS-PS1-8