Structure of the Atom

What is the smallest part of matter that still retains the properties of its element?

• Atoms

• Nucleus

• Quarks

Which subatomic particle has a charge of +1?

• Proton

• Neutron

• Electron

Which subatomic particles have a mass of about 1 amu? [Select all that apply]

• Protons

• Neutrons

• Electrons

One of the first ideas about the makeup of matter was...

• ...it's made of small, indestructible spheres.

• ...it's made of fire, water, earth, and air.

• ...it has a nucleus and an electron cloud.

Answer explanation

This wasn't CORRECT, though!

Tags

NGSS.MS-PS1-1

Who was the scientist that revived the ancient idea of the atom?

• Democritus

• Aristotle

• Dalton

What old model of the atom is pictured here, and still sometimes used?

• Planetary Model

• Electron Cloud Model

• Plum Pudding Model

Which subatomic particle determines the identity of an atom?

• Proton

• Neutron

• Electron

Which subatomic particles determine the overall electrical charge of an atom? [Select all that apply.]

• Proton

• Neutron

• Electron

Tags

NGSS.HS-PS1-7

Which subatomic particles determine the mass number of an atom? [Select all that apply]

• Protons

• Neutrons

• Electrons

Which subatomic particles are found in the electron cloud of an atom? [Select all that apply]

• Protons

• Neutrons

• Electrons