Covalent Quiz

When an atom loses an electron, it becomes a:

• positive ion

• 
  neutral ion

• negative ion

• 
  neutral atom

The Octet Rule states that in chemical compounds, atoms tend to have

• the electron configuration of a noble gas

• more electrons than protons

• eight electrons in their valence energy level

• more protons than electrons

In naming a covalent compound, the number of atoms of each element present in the molecule is indicated by

• Roman numerals

• prefixes

• 
  superscripts

• suffixes

What type of elements are in a covalent bond?

• nonmetal bonded to a nonmetal

• metal bonded to a nonmetal

• metal bonded to a metal

• none of the above

What is the correct name for the molecule shown in the picture?

• potassium chloride

• potassium pentachloride

• phosphorus tetrachloride

• phosphorus pentachloride

How many total atoms are present in a molecule of diphosphorus pentoxide?

answer choices

• 2

• 5

• 7

• 9

• The number of covalent bonds in NH₃ is:

• 2

• 3

• 4

• 5

Which of the following molecules has a double covalent bond?

• C₂H₂

• CH₄

• H₂O

• CH₂Cl₂

Which of the following is the correct Lewis dot structure for the molecule fluorine (F₂)?

• A

• B

• C

• D

Name this compound

• 
  

  barium fluoride

• boron triflouride

• monoboron trifluoride

• trifluorine boride