Science Practice 2

Noble gases are inert because they have completed outer electron shells. Which of these elements isn't a noble gas?

• A. Helium

• B. Chlorine

• C. Argon

• D. Krypton

The PH scale was invented by

• Robert Boyle

• Newton

• Sorensen

• Pascal

Which is a mild corrosive base

• Baking soda

• Bleaching powder

• Plaster of Paris

• Gypsum

The atomic mass of an element tells you

• The number of protons and neutrons

• The number of protons and electrons

• The number of neutrons and electrons

• The number of neutrons only

The atomic number tells you

• The number of electrons

• The number of protons

• The number of neutrons

• The number of nucleons

The electronic configuration of a magnesium ATOM is

• 2, 8

• 2, 8, 3

• 2, 6

• 2, 8, 2

The electron configuration of a magnesium ION is

• 2, 8, 6

• 2, 8, 8

• 2, 8, 2

• 2, 8

Elements from groups 1-3

• Are metals and lose electrons in a chemical reaction to become CATIONS

• Are metals and lose electrons in a chemical reaction to become ANIONS

• Are metals and gain electrons in a chemical reaction to become CATIONS

• Are metals and gain electrons in a chemical reaction to become ANIONS

How would you name the following compound? MgS₂

• Magnesium sulfur

• Dimagnesium sulfide

• Magnesium sulfide

• Magneside sulfide

The energy of motion

• boiling

• density

• element

• Kinetic energy