Lewis Structural Formulas Covalent Bonds

According to the octet rule most elements need _______ valence electrons.

• 2
• 8
• 6
• 18

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Hydrogen needs _____ electrons in its valence shell to be stable.

• 4
• 6
• 8
• 2

Tags

NGSS.HS-PS1-1

A Lewis structure can be used for showing an ionic bond but instead for dashes for the bonds positive and negative _____ are represented.

• atoms
• ions
• molecules
• electrons

If electrons are shared unequally then the bond is....

• Non-polar covalent
• Ionic
• Non-polar ionic
• Polar covalent

If electrons are shared equally then the bond is....

• Non-polar covalent
• Ionic
• Non-polar ionic
• Polar covalent

Metals and nonmetals form which kind of bond?

• Polar covalent
• Ionic
• Non-polar covalent
• Metallic

How strongly an atom attracts electrons is called....................

• Ionization energy
• Electronegativity
• Electricity
• Nuclear force

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the correct combination of elements in a covalent bond?

• metal and nonmetal

• atoms of 2 different metals

• 2 nonmetals

• atoms of the same metal

How many electrons should an Oxygen atom have around its Lewis dot symbol?

• 5

• 6

• 7

• 8

Tags

NGSS.HS-PS1-1

Three pairs of electrons are shared in a

• Single bond
• Double bond
• Triple bond