Atomic Structure Quiz

What is a positively charged particle in an atom called?

• nucleus

• neutron

• proton

• electron

Which two particles together form a dense center in an atom?

• proton and neutron

• neutron and electron

• proton and electron

• nucleus and isotope

What is the dense center of an atom called?

• isotope

• core

• nucleus

• cloud

Which type of compound was likely in the shampoo if it turns red litmus paper blue?

• Acidic

• Basic

• Neutral

• Non-reactive

What was missing from John Dalton's atomic theory?

• Atoms are made up of smaller particles.

• All atoms of the same element are identical.

• Atoms of different elements have different masses.

• Compounds form when atoms of different elements combine in a specific ratio.

Which two statements support the claim that the atom has a dense, positively charged core according to Rutherford's gold foil experiment?

• Some positive particles deflected at sharp angles.

• Some negative particles deflected at sharp angles.

• Most of the positive particles passed straight through the foil.

• Some positive particles bounced back in the direction they came from.

Carbon has an atomic number of 6. How many neutrons are in an atom of Carbon-14?

• 2

• 6

• 8

• 14

Which statement best explains why the table of elements is periodic?

• All elements are included in the table.

• It has rows and columns, as a calendar does.

• Properties of the elements repeat in a cycle or repeating pattern.

• It has many different parts, each of which is different from other parts.

What does the atomic number of an element represent?

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The total number of protons and neutrons in the nucleus

• The total number of protons and electrons in an atom

Which subatomic particle is not found in the nucleus of an atom?

• Proton

• Neutron

• Electron

• All of the above are found in the nucleus