Unit Vocabulary Test: Periodic Table

What is the smallest unit of an element that retains all the characteristics of that element?

• Molecule

• Atom

• Compound

• Ion

Which subatomic particle has a positive charge and is located in the nucleus of an atom?

• Electron

• Neutron

• Proton

• Photon

Calculate the mass number of an isotope with 6 protons and 8 neutrons.

• 6

• 8

• 14

• 12

Which of the following is a characteristic of metals?

• Brittle

• Poor conductor of electricity

• Shiny luster

• Gains electrons easily

What is the atomic number of an element with 15 protons?

• 15

• 30

• 45

• 60

Which element is likely to be a metalloid?

• Oxygen

• Silicon

• Iron

• Helium

Which of the following statements is true about isotopes?

• They have different numbers of protons.

• They have the same atomic mass.

• They have different numbers of neutrons.

• They have different chemical properties.

What is the average mass of all the different isotopes of an element called?

• Atomic number

• Mass number

• Atomic mass

• Isotopic mass

Which rule states that atoms lose, gain, or share electrons to have 8 valence electrons?

• Duet Rule

• Octet Rule

• Valence Rule

• Electron Rule

• Proton

• Neutron

• Electron

• Positron