WorksheetsValence Electrons and Chemical Bonds Quiz
Total questions: 30
Worksheet time: 45mins
Where is a valence electron found? A valence electron is found in the ______ of an atom.
electron cloud
outermost shell
inner most shell
centermost shell
How many valence electrons are in this given electronic configuration: 1s22s22p6 ?
2
6
8
10
Which of the following substances is an inert gas?
4Be
2He
1H
3Li
Which particles are involved in the formation of a chemical bond?
protons in the nucleus
neutrons in the nucleus
electrons in the innermost shell
electrons in the outermost shell
What holds atoms together to form a molecule?
chemical bond
electrostatic force
nuclear force
intermolecular force
In what way is the chlorine ion different from the chlorine atom? Chlorine ion __________ than the chlorine atom.
is more stable
has more protons
has more electrons
all of the above
What type of chemical bond is present in sugar (C12H22O11)?
chemical
covalent
ionic
metallic
Which force of attraction affects the shape of the molecules of a compound?
attractive
chemical
physical
repulsive
When can we say that the shape of the molecule in a compound is unsymmetrical? It is unsymmetrical if ______.
the same atoms are bonded to a central atom
there is a uniform electrical distribution in the molecule
the angles formed between bonding atoms are not equal
the molecule has different atoms bonded to the central atom at varying angles and electrical distribution
Carbon monoxide (CO) is a colorless, odorless gas produced by incomplete combustion of fuel. What is the shape of a CO molecule?
bent
linear
pyramidal
v-shaped
What affects the polarity of a molecule?
electrical distribution
shape of the molecule
electronegative difference
all of these
What type of chemical bonds holds atom together if the electronegative difference is 2.0 and above?
chemical
covalent
ionic
none of these
What kind of molecule has opposite charged ends?
covalent
dipole
nonpolar
polar
Given the electronegativity values: Q=0.8; R=1.0; S=3.0 and T=3.4, which pair of atoms has the highest tendency to be nonpolar?
Q&S
R&T
R&S
S&T
Why is it difficult to find pure water in nature? It is difficult to find pure water in nature because water ______________________________.
has high specific heat
dissolves almost all substances
possess high boiling point
all of these
In an electronic configuration, which of these particles are being distributed?
electrons
neutrons
proton
quarks
How many valence electron does a neutral atom of sodium have?
1
4
6
7
Given the electronic configuration: 1s22s22p4, how many valence electrons are present?
2
6
8
10
Which group of elements are inert/noble?
I
II
VII
VIII
What is the bond that holds atoms together in a compound?
atomic bond
chemical bond
molecular bond
all of these
What rule states that atoms become stable by having eight valence electrons as they interact with each other?
Lewis
Octet
Stellar
Big Bang
Which pair of elements would create an ionic bond?
Na & Na
Na & Cl
Cl & Cl
Cl & O
In what way is the sodium ion different from the sodium atom?
The ion has more protons than the atom.
In an ion there are more electrons than an atom.
A sodium ion tends to attract negative ions than atoms.
There is more tendency for sodium ions to attract positive ions than atoms.
How many lone pairs do you have in a water (H2O) molecule?
two
none
one
three
What type of chemical bond is present in water (H2O)?
chemical
covalent
ionic
metallic
What is the shape of a berrylium chloride (BeCl2) molecule?
bent
linear
pyramidal
v-shaped
What is the distribution of electrical charge over the atoms joined by a bond?
bonding
molecularity
polarity
shaping
What is identified as the atom's ability to attract electrons toward itself?
valence
electronegativity
bond
shape
Which of the following is a polar molecule?
ammonium (NH4)
hydrogen gas (H2)
hydrogen chloride (HCl)
oxygen gas (O2)
What is identified as the atom's ability to have poles or a positive end and a negative end leading to have a dipole moment in a molecule?
bonding
polarity
molecularity
electronegativity
