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WorksheetsCovalent Chemistry Edrolo Chapter 2
Total questions: 10
Worksheet time: 8mins
The valence of an atom is their....
inner shell
outer shell
According to the octet rule, atoms are most stable with how many electrons in their valence shell?
Two
Four
Six
Eight
Which element is the most electronegative?
Fluorine
Oxygen
Fluoride
Nitrogen
Chlorine
A difference in electronegativity between two covalently bonded atoms results in...
a non-polar covalent bond
a non-polar hydroge bond
a polar dispersion bond
a polar covalent bond
True or False: a molecule with polar covalent bonds must be polar overall
True
False
Of the molecules CO2, CH4, NH3, H2O, BF3, and H2S the two with the same shape are:
CO2 and H2O,
H2O and H2S
CH4 and NH3
BF3 and NH3
Of the intramolecular forces shown below, which is the most polar?
C-H
N-H
O-H
F-H
Select the alternative that correctly lists the properties of molecular compounds.
Low melting point, ductile and conducting electricity as a liquid
Low melting point, lattice structure and brittle
High melting point, non-conductive of electricity and hard
Low melting point, non-conductive of electricity as a solid and as a liquid
A single covalent bond is formed when:
two atoms share a pair of electrons
one atom donates an electron to another atom
The melting point of a substance is the temperature at which
the substances changes from a liquid to a soild
the substances changes from a gas to a liquid
the substances changes from a soild to a liquid
the substances changes from a liquid to a gas
