Atomic Structure.

Do any of the atom diagrams below represent atoms of

the same element?

• Yes, all of the atoms are the same

  element.

• Yes, atom A and atom B are the same

  element.

• Yes, atom A and atom C are the same

  element.

• No, they are all different elements.

A student made a model of an atom using gelatin and

grapes in a bowl as shown. Which part of the model

would represent a proton?

• A grape.

• The area outside of the bowl.

• The bowl.

• A part of the gelatin.

A sodium (Na +) atom contains 11 protons, 12

neutrons, and 11 electrons. In order to make the

sodium ion (positive) Na +, what must occur to

the sodium atom?

• It must lose one proton.

• It must gain one proton.

• It must gain one electron.

• It must lose one electron.

In an atom, the number of protons equals the number of ___________.

• Nuclei.

• Electrons.

• Isotopes.

• Neutrons.

The atomic number of an element is based on the _______________.

• Number of protons in its nucleus.

• Number of electrons around its core.

• Mass of it’s nucleus.

• Number of neutrons in it’s nucleus.

LeBron learned about different parts within an atom. Which part of an atom is the LEAST massive?

• Neutron.

• Electron.

• Proton.

• Nucleus.

What does the atom consist of?

• Elements, protons, and neutrons.

• Neutrons and protons.

• Electrons, protons, and neutrons.

• Electrons, protons, and alpha particles.

A student has blueberries, lemons, limes, and oranges

available to make a model of an atom. Based on their

size, which would BEST represent electrons in the

model?

• Oranges.

• Lemons.

• Limes.

• Blueberries.

The diagram shows the nuclei of some elements. Which

are nuclei of the same element?

• 1 and 3.

• 3 and 4.

• 2 and 4.

• 1 and 2.

A particle with zero charge found in the nucleus

of an atom is called a(n) __________.

• Positron.

• Neutron.

• Proton.

• Electron.