Chemical Bonding and the Shapes of Molecules

1. Which element will have 5 electrons in its Lewis dot symbol?

• A. Argon

• B. Boron

• C. Carbon

• D. Phosphorus

Which element is the least electronegative?

• A. Calcium

• B. Cesium

• C. Iron

• D. Barium

The complete transfer of one or more electrons between atoms constitutes in forming ___________.

• A. ionic bond

• B. covalent bond

• C. coordinate covalent bond

• D. dative bond

It is important to know the geometry of a molecule because it

• A. affects the physical and chemical properties of the substance

• B. will give the Lewis structure of the molecule

• C. will determine whether the molecule is ionic or covalent

• D. B and C

If there are four (4) electron pairs around the central atom of a molecule, these electron pairs are in a _________________arrangement.

• A. linear

• B. trigonal planar

• C. tetrahedral

• D. octahedral

A list of non-metals is given below. Which elements can exceed the octet rule?

S, C, Cl, O

• A. O

• B. C

• C. Cl

• D. S

Which of the following represents a non-polar covalent bond?

• A. H-O

• B. C-N

• C. C-C

• D. Li-F

What type of bond does NO₂ forms?

• A. ionic bond

• B. covalent bond

• C. coordinate covalent bond

• D. dative bond

Atoms bond to other atoms to obtain a/an _______________ electron configuration.

• A. alkali metal

• B. halogen

• C. noble gas

• D. Chalcogen

It is a measure of how equally the electrons in a bond are distributed between the two atoms involved in a covalent bond.

• A. polarity

• B. octet rule

• C. ionization energy

• D. electron affinity