Atoms and elements

Which subatomic particle is located inside the nucleus and has a positive charge?

• electron

• proton

• neutron

Which subatomic particle is located inside the nucleus and has a neutral charge?

• electron

• proton

• neutron

Which subatomic particle is located outside the nucleus and has a negative charge?

• electron

• proton

• neutron

Which subatomic particle is the smallest but fastest?

• proton

• electron

• neutron

What do you call the center of an atom?

• the center

• the nucleus

• the electron cloud

______ are pure substances made of only 1 type of atom.

• atoms

• molecules

• compounds

• elements

------- are the smallest unit of an element that retains the properties of that element.

• molecules

• atoms

• compounds

Tags

NGSS.MS-PS1-5

The atomic number tells you the number of -------- .

• protons

• neutrons

An atom of potassium has an atomic number of 19. This means it has 19 what?

• neutrons

• protons

• mass units

Tags

NGSS.MS-PS1-1

The atomic mass is approximately the number of ------ and ------- added together.

• protons and neutrons

• protons and electrons

• electrons and neutrons