2. The chemical formula for a compound having one barium(Ba) ion and two chloride (Cl) ion is
a) BCl
b) BaCl
c) BaCl2
d) Ba2Cl2
c) BaCl2
100
14. Which molecule is polar?
a. CCl4
b. CO2
c. SO3
d. none of these
d. none of these
100
1. All compounds are made of
a. atoms of two or more elements
b. two or more atoms of the same element
c. atoms arranged in a crystal
d. atoms joined by covalent bond
a. atoms of two or more elements
100
6. In writing the an element’s electron-dot notation, we must determine the element’s number of _______________
a. total number of protons
b. total number of neutrons
c. valence electrons
d. total number of atoms around the element
c. valence electrons
100
12. If you compare the melting point of an ionic compound to the melting point of covalent bonding, which one has a higher melting point?
a. the ionic bond
b. covalent bond
c. they both melt at the same temp
d. none of the above
a. the ionic bond
200
3. The compound KBr has the name
a. potassium bromide
b. potassium bromine
c. bromide potassium
d. bromine potassium
a. potassium bromide
200
16. Which of the following bonds would be polar?
a. C-C
b. H-F
c. Cl-Cl
d. Br-Br
b. H-F
200
4. An atom becomes a positive ion, when it
a. is attracted to all nearby atoms
b. gains an electron from another atom
c. loses an electron to another atom
d. shares an electron with another atom
c. loses an electron to another atom
200
7. elements in group 2 have ____________ valence electrons
a. 2
b. 12
c. 13.
d. 1
a. 2
200
15. Which one of the following is not a type of intermolecular force?
a. dipole-dipole forces
b. London dispersion forces
c. ionic bonding
d. hydrogen bonding
c. ionic bonding
300
11. if you have ca+2 and Cl-1, what would the formula of the ionic bond that forms from these ions
a. CaCl
b. CaCl2
c. Ca2Cl
d. Ca2Cl2
b. CaCl2
300
symmetrical compounds are polar?
a) True
b) False
b) False
300
5. A covalent bond forms when
a. two atoms share electrons
b. one atom loses electron(s) to an another atom
c. one atom gains electron(s) from another atom
d. b and c
a. two atoms share electrons
300
8. The electron-dot notation for Nitrogen is
a. (see the white board for answer choices)
b.
c.
d.
C
300
A molecule with 2 bonding-pairs and 1 lone-pair has the shape
a) bent
b) trigonal planar
b) trigonal pyramidal
c) tetrahedral
a) bent
400
Name the following covalent compound. SO2
a) sulfur oxide
b) sulfur dioxide
c) monosulfur oxide
d) monosulfur dioxide
b) sulfur dioxide
400
An assymetrical molecule is a molecule that has just one line of symmetry
a) true
b) false
a) true
400
13. Which molecule contains double bond?
a. COCl2
b. C2H6
c. CF4
D. SF2
a. COCl2
400
9. Draw the Lewis structure of ammonia, NH3
a. (see white board for answer choices)
b.
c.
d.
B
400
Molecules with a bent structure the molecules are polar?
a) true
b) false
a) true
500
Which of the following is a covalent compound?
a) CO2
b) KBr
C) CH4
d) a and c
d) a and c
500
Look at the molecule one the white board for 500 point. That molecule is _________
a) polar
b) non-polar
b) non-polar
500
What does the acronym SNAP stand for?
Symmetrical molecules are non-polar
Assymetrical molecules are polar
500
10. Draw the lewis structure for carbon dioxide CO2
a. (see white board for answer choices)
b.
c.
d.
C
500
A molecule with 4 bonding-pairs and 0 lone-pair has the following molecular geometry
a) Linear
b) trigonal planar
c) Trigonal pyramidal
d) tetrahedral