Covalent Bonding

Which of these elements does not exist as a diatomic molecule?

• I

• F

• H

• He

Which one of the following compounds is not covalent?

• SCl₂

• KCl

• HCl

• S₂Cl₂

How many valence electrons does an atom of any halogen have?

• 1

• 2

• 4

• 7

Tags

NGSS.HS-PS1-1

A diatomic molecule with a triple covalent bond is

• N₂

• Br₂

• H₂

• O₂

A molecule of nitrous oxide, N₂O, contains all of the following except

• a coordinate covalent bond.

• a triple bond.

• a double bond.

• nonbonding pairs of electrons.

If a bonding pair of electrons is unequally shared between two atoms, the bond is

• ionic.

• nonpolar covalent.

• coordinate covalent.

• polar covalent.

Tags

NGSS.HS-PS1-3

What is the electron dot structure for water?

• H:O:H

• H:O: (with dots around O)

• H:O: (with dots around H)

• H:O:H (with dots around O)

Tags

NGSS.MS-PS1-1

Which of the following compounds is not ionic?

• NaI

• CaCl₂

• CO₂

• Na₂O

Tags

NGSS.HS-PS1-1

A covalent bond forms

• when an element becomes a noble gas.

• when atoms share electrons.

• between metals and nonmetals.

• when electrons are transferred from one atom to another.

Which of these compounds would not have covalent bonds?

• NO₂

• K₂O

• N₂O₄

• H₂O₂

Tags

NGSS.HS-PS1-1