Comprehensive Chemistry Quiz

The heat of fusion of a compound is 330 joules per gram. How many joules of heat must be absorbed by a 5 gram sample to change the compound from a solid to a liquid at its melting point?

• 1650 joules

• 66 joules

• 335 joules

• 325 joules

Given a chemical reaction, at which temperature will the reaction occur at the greatest rate?

• 50 °C

• 100 °C

• 75 °C

• 25 °C

An element with one electron in its outer shell is called a(n)

• noble gas

• halogen

• alkaline earth metal

• alkali metal

In general, how many electrons should an atom have in its outer energy level to be chemically stable?

• 8

• 4

• 1

• 6

Which of the following Lewis dot structures contain a triple bond?

• H₂O

• CH₄

• N₂

• O₂

Which of the following atoms has three valence electrons?

• magnesium

• aluminum

• silicon

• sulfur

Which of the following bonds is formed as a result of a transfer of electrons?

• metallic

• ionic

• intermolecular

• covalent

Which of the following has the largest atomic radius?

• Be

• Li

• Sr

• Xe

Which of the following has the greatest ionization energy?

• Br

• Cl

• F

• I

When a potassium atom reacts with bromine, the potassium atom will:

• lose 2 electrons

• lose 1 electron

• gain 1 electron

• gain 2 electrons