How many unpaired electrons are in the Lewis dot symbol of a chlorine  atom?

• 7
• 3
• 5
• 1

Which one violates the octet rule?   

• S^2-
• Mg¹⁺
• O^2-
• Fr¹⁺

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which one of the following forms an ionic bond with Chlorine?

• C
• Mg
• P
• As

Which of the following molecules is exception to octet rule?

• PCl₅
• COCl₂
• CCl₄
• H₂O

As the number of bonds increases, the strength of the bond ________.

• increases
• stays the same
• decreases
• You can't tell

Tags

NGSS.HS-PS1-4

How many available valence electrons are in SO₄^2- ion?

• 32
• 30
• 24
• 28

What are the approximate bond angles in CS₂?

• 107⁰
• 109.5⁰
• 120⁰
• 180⁰

The molecular geometry of boron trichloride is...

• tetrahedral
• trigonal planar
• trigonal bipyramidal
• trigonal pyramidal

Which of the following groups contains no ionic compounds?

• HCN, NO₂, Ca(NO₃)₂
• KOH, CaF₂, NaNH₂
• PCl₅, LiBr, Zn(OH)₂
• CH₂O, H₂S, NH₃

Tags

NGSS.HS-PS1-3

Which molecule contains one unshared pair of valence electrons? 

• H₂O
• NH₃
• CH₄
• CO₂