Some Random Review Game

Triangle

200

What type of element almost never goes in the center of a molecule in a Lewis structure?

Hydrogen

300

How many total valence electrons are available in the molecule NBr₃?

26

400

How many double bonds and triple bonds are present in the BF₃ molecule? (Specify your answer for each)

One double bond and zero triple bonds

500

What is the molecular geometry for PF₄Br, and is it considered polar or nonpolar?

Trigonal bipyramidal, polar

Square

200

How many valence electrons are represented by a single covalent bond?

Two

300

What AXE notations are considered bent?

AX₂E₁ and AX₂E₂

400

What is the AXE notation for the IF₅ molecule?

AX₅E₁

500

Is XeF₄ polar or nonpolar? Justify your answer.

XeF₄ is nonpolar because it has an AX₄E₂ notation (or square planar geometry) which is symmetrical.

Pentagon

200

What type(s) of elements is/are molecules generally made of?

Nonmetals

300

How many total valence electrons are available in the IF₇ molecule?

56

400

How many valence electrons does the center atom have in the XeF₅⁻ ion?

14

500

What is the AXE notation for the XeOF₅⁻ ion?

AX₆E₁

Hexagon

200

Which type of ion has more valence electrons than normal?

Anions (or negative ions)

300

How many total electrons are available in the H₂O molecule?

10

400

What is the molecular geometry for the SF₆ molecule?

Octahedral

500

Is COS polar or nonpolar? What is the hybridization of that center atom, and what are the bond angles around that center atom?

Polar, sp-hybridized, 180°

Octagon

200

How many valence electrons do most atoms want to have in Lewis structures?

Eight

300

What types of elements can be happy with more than eight valence electrons?

Elements in the third row or below

400

What are the bond angles for the SF₄ molecule?

90° and 120°