Atomic Structure

What are the subatomic particles?

• Protons, Electrons, Neutrons

• Molecules, and atoms

• Electrons, Protons, Nucleus

• Nucleus, and Electrons

What is this subatomic particle that has positive charge?

• Electron

• Neutron

• Proton

• Megatron

What is this subatomic particle that has negative charge?

• Electron

• Neutron

• Proton

• Megatron

What is this subatomic particle that has no charge?

• Electron

• Neutron

• Proton

• Megatron

What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.

• cell

• nucleus

• atom

• electron

What is the center of an atom containing protons and neutrons?

• nucleus

• neutron

• proton

• electron cloud

What is the combined mass of all the protons and neutrons of an atom and is approximately equal to the number of protons and neutrons?

• atomic mass

• atomic number

• subatomic particles

• nucleus weight

Look at this picture of Argon off the periodic table. Which of the following is true for this element?

• 18 protons

• 40 protons

• 22 protons

• 21.9 protons

Outside the nucleus of an atom are these

• protons

• neutrons

• quarks

• electrons

All atoms of a particular element have the same number of these

• electrons

• neutrons

• protons