GCSE Covalent bonding

What type of bonding occurs between chlorine and fluorine molecules?

• Ionic
• Metallic
• Weak intermolecular force
• Covalent
• Atomic

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Covalent bonds occur when electrons are ….

• Discharged
• Delocalised
• Transferred
• Lost
• Shared

Tags

NGSS.HS-PS1-1

How many covalent bonds are there in total in a molecule of methane, $CH_4$  ?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-1

How many covalent bonds are there in a single molecule of oxygen, $O_2$   ?

• 1

• 2

• 3

• 4

A covalent bond is strong because:

• There are strong electrostatic forces of attraction between the atoms.

• There are strong electrostatic forces of attraction between the shared electron pair and the two bonding nuclei.

• Electrons are strong.

• Electron pairs are strong.

What is a molecule?

• A transfer of electrons.

• A group of atoms joined together by covalent bonds

• Electrons that are shared.

• a group of charged particles

Tags

NGSS.HS-LS1-6

What does the subscript "2" in a chlorine molecule mean?

• There are two chlorine atoms bonded ionically.

• There are two chlorine atoms bonded covalently.

• There are two shared valence electrons.

• There is one shared valence electrons.

Tags

NGSS.MS-PS1-1

Which two elements are most likely to form a covalent bond?

• C and Ca

• P and F

• Sr an S

• Li and Cl

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The name of SO₃ compound is

• sulfate
• sulfur oxide
• sulfur trioxide
• monosulfur trioxide

What is a diatomic element?

• a metal bonded with a nonmetal
• 2 or more nonmetals bonded together
• 2 or more metals bonded together
• 2 atoms of the same element bonded together