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WorksheetsCovalent Compounds
Total questions: 25
Worksheet time: 25mins
Which of the following is the correct Lewis structure for the compound PBr3?
structure A
structure B
structure C
structure D
Which of the following is a covalent molecule?
(Use the Periodic Table)
NaCl
MgO
O2
K2S
Which of the following is a covalent molecule? (Use the Periodic Table)
CCl4
MgCl2
KF
K2S
In chemical compounds, covalent bonds form when
the electronegativity difference between two atoms is very large.
electrons are completely transferred between two atoms.
pairs of electrons are shared between two atoms.
ions are held together by opposite charges.
Nitrogen has (a) valence electrons, which means it has (b) bonding places to make covalent bonds with other nonmetals
5
3
1
2
4
6
8
7
In a covalent bond, one or more electrons are?
shared
lost
gained
transferred
Elements need (a) valence electrons to become stable when they form compounds, except for hydrogen, which only needs (b)
8
2
1
3
4
5
6
7
Covalent bonds are between...
Metal and Nonmetal
Nonmetal and Nonmetal
How are covalent bonds formed?
electrons are shared
electrons are transferred
covalent bond = ________________
shared electron
shared electrons
shared electrons
shared electrons
What is the correct formula for this molecule?
NH
N3H
NH3
NH4
How many bonds does Nitrogen (N) form?
1
2
3
4
Which of the following is a correct drawing of the molecule H2?
Which of the following is the correct drawing for the molecule Cl2?
Which of the following is the correct drawing of the molecule H2O?
How many bonds does Carbon (C) form?
1
2
3
4
How many bonds does Oxygen (O) form?
1
2
3
4
How many bonds does Hydrogen (H) form?
1
2
3
4
Which of the following is a covalent compound?
NaCl
H_2O
CaCl_2
KBr
What type of bond is formed when two nonmetals share electrons?
Ionic bond
Covalent bond
Metallic bond
Hydrogen bond
Which of the following molecules has a double covalent bond?
O_2
H_2
N_2
Cl_2
In a covalent bond, electrons are...
shared equally between atoms
transferred from one atom to another
shared unequally between atoms
not involved in bonding
Which of the following is a property of covalent compounds?
High melting point
Conduct electricity in solution
Low melting point
Form crystal lattice
Which molecule is an example of a polar covalent compound?
CH_4
CO_2
HCl
O_2
What is the main reason covalent compounds do not conduct electricity?
They have no free electrons or ions
They have high melting points
They form crystal lattices
They are soluble in water
