WorksheetsChemical Bond Test Review
Total questions: 30
Worksheet time: 15mins
What is a valence electron?
An electron found in the innermost shell of an atom
An electron that is found in the outermost shell of an atom
An electron found in the middle shell
What is the number of valence electrons for group 14 on the periodic table?
3
4
14
8
What is the number of valence electrons for neon and the other noble gases?
7
5
8
6
A covalent bond forms when atoms ______ electrons.
lose
gain
transfer
share
Which type of bond has a transfer of an electron from one atom to another?
metallic
ionic
covalent
polar
How many valence electrons are in this structure?
4
7
5
6
Ionic bonding is between a
Depends on the situation
nonmetal and nonmetal
metal and metal
metal and nonmetal
Which category of elements usually form negative ions?
nonmetals
metalloids
metals
noble gases
Predict the bond between Rubidium and Fluorine
metallic
polar
ionic
covalent
Which is the correct name for CaBr2
Bromine Calcium
Bromine Calcide
Calcium Bromide
Bromine Carbide
WHich of the following would have a high boiling point?
MgO
CO
NO2
CH4
What charge would a potassium (K) ion have?
-2
-1
+1
+2
A solid substance is soft, has a low melting point and is a poor conductor of electricity. The substance is most likely formed with
ionic bonds
metallic bonds
polar bonds
covalent bonds
Which is the correct electron dot model for oxygen?
The number of ___ is most important in determining how atoms will bond.
neutrons
electrons in the first energy level
protons
valence electrons
Is this molecule polar or nonpolar?
polar
nonpolar
A ______ is a force that hold atoms together in a compound.
chemical reaction
chemical formula
chemical bond
synthesis reaction
A _________________ is composed of symbols and subscripts indicating the number of atoms of an element in a compound.
chemical formula
chemical equation
chemical reaction
chemical notation
Atoms form compounds when the compound is more ______________ than the separate atoms. Noble gases are more _________than other elements because they have a complete outer energy level.
explosive
stable
toxic
reactive
A _______ is a charged particle because it has more or fewer electrons than protons. When an atom _____ an electron, it becomes a positively charged ion. When an atom ____an electron, it becomes a negatively charged ion.
isotope, gains, loses
ion, loses, gains
ion, gains, loses
isotope, loses, gains
The sum of the charges on the ions in a unit of the compound is
positive 1
negative 1
zero
depends on the atoms involved
How many magnesium atoms in Mg(NO3)2
1
2
3
6
How many oxygen atoms in 3Mg(NO3)2
6
9
18
How many molecules of methane are there?
0
1
2
4
If there is no subscript, there is ______ atom(s) of that element.
0
2
only 1
1 million
A subscript is the small number below a(n) ________ that tells the number of _______ of that element.
element symbol; atoms
atom; element symbol
subscript; protons
compound; elements
Atoms of elements that share their electrons unequally are
ionic
polar
nonpolar
metallic
Which of these compounds would have the lowest melting point?
NaCl
BaBr2
AsCl3
KCl
When representing chemical bonds, _______ represent electrons being transferred and ______ represent electrons that are being shared
circles, arrows
lines, sticks
circles, lines
arrows, circles
