Modern Physics Intro

Collectively, which particles in the atom are considered nucleons?

• protons

• neutrons

• electrons

Atoms are comprised of

• protons

• neutrons

• electrons

• photons

Which particles in an atom have an electric charge?

• protons

• neutrons

• electrons

True or false: An atom is mostly empty space.

• True

• False

Which particle(s) is made of smaller particles?

• protons

• neutrons

• electrons

• none, these are all fundamental particles.

Which represents the number of protons in an element?

• atomic mass

• atomic number

• energy levels

• charge

How can you find the number of neutrons in an element?

• equal to atomic number

• equal to negative of atomic number

• equal to atomic mass + atomic number

• equal to atomic mass - atomic number

What is the atomic number of Carbon?

• 6

• 12

• -6

• 18

How many protons does Uranium have?

• 92

• 238

• 146

• it can change

When an atoms gains or loses electrons, it is called?

• a nuetron

• an isotope

• an element

• an ion