Which molecule has a single covalent bond?
Cl2 -
CO2 -
N2 -
CO
Cl2
100
How many unshared electrons are in a molecule of hydrogen iodide?
3
100
Which of these elements do not exist as a diatomic molecule? F - N - I - Ca - C - S - Br - H
Ca - C - S
200
Which of the following formulas represents a molecular compound?
SO2
ZnO
BeF2
Xe
SO2
200
Which of the following correctly shows a prefix used in naming binary molecular compounds with its corresponding number?
A) octa-, 4 c. hexa-, 6
B) nona-, 5 d. deca-, 7
c. hexa-, 6
200
How many electrons are shared in a single covalent bond
2
200
Which of the following formulas represents an covalent compound? MgO - NaCl - BaI2 - PCl2
PCl2
300
Write the correct formula for sulfur hexafluoride.
SF6
300
Which of the following elements can form diatomic molecules held together by triple covalent bonds?
Nitrogen - Oxygen - Flourine - Carbon
Nitrogen
300
How many unshared pairs of electrons are in a water (H2O) molecule?
2
300
What is the structural formula for PH3
P in the middle a bond to the left, below and to the right with a H followed. There will be 1 unshared pair above the P
400
What is the structural formula for H2O.
H-O-H
Unshared pairs not shown
400
What is the structural formula for CH4
C in the middle and a bond above, to the left, below, and to the right of the C all followed by an H
400
What is the structural formula for CO2
O=C=O
Unshared pairs not shown
400
What is the structural formula for Br2
Br-Br
Unshared pairs not shown
500
How do atoms achieve noble-gas electron configurations in single covalent bonds?
Two atoms share two electrons.
500
Name the following N2O5
Dinitrogen pentoxide
500
How many unshared pairs of electrons does the nitrogen atom in ammonia NH3 ?
1
500
How many electron pairs are shared in a double covalent bond?