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WorksheetsAtoms and Bonding Unit 4
Total questions: 44
Worksheet time: 22mins
Name
Class
Date
1.
Valence electrons are ________________________
a)
Electrons with the lowest energy
b)
Neutral electrons
c)
Electrons that have the highest energy
d)
Any electrons surrounding a neucleus
2.
What is an electron dot diagram?
a)
A diagram that includes the symbol for the element surrounded by dots
b)
A pretty picture of an electron
c)
The name of a symbol surrounded by dots
d)
The symbol for a compound surrounded by stars
3.
What is a chemical bond?
a)
When atoms bond and neutrons are shared
b)
The force of attraction that holds atoms together as a result of the rearrangement of electrons between them
c)
When electrons jump from atom to atom
d)
When atoms have 7 electrons
4.
Where do you find information about valence electrons?
a)
The science textbook
b)
The periodic table
c)
Bill Nye the Science Guy
d)
Justin (he knows it all)
5.
Does the number of valence electrons increase or decrease from left to right on the periodic table?
a)
increase
b)
decrease
c)
increase then decrease
d)
decrease then increase
6.
The Noble Gases have how many electrons? (Except for Helium - that has 2)
a)
2
b)
5
c)
7
d)
8
7.
Which elements always lose valence electrons?
a)
metals
b)
non metals
c)
metaloids
d)
noble gases
8.
Which elements gain valence electrons?
a)
metals
b)
non metals
c)
alkalines
d)
noble gases
9.
Which group can either gain or lose valence electrons?
a)
metals
b)
non metals
c)
metaloids
d)
noble gases
10.
An element's reactivity is determined by the number of _________ found in an atom of the element.
a)
protons
b)
neutrons
c)
ions
d)
valence electrons
11.
Atoms are stable and nonreactive if they have __________valence electrons.
a)
six
b)
five
c)
eight
d)
ten
12.
The reactivity of a metal depends on how easily it ____________its valence electrons.
a)
loses
b)
gains
c)
pushes
d)
uses
13.
Elements within each __________________ in the periodic table have similar properties because they have the same number of valence electrons
a)
period
b)
group
c)
family
d)
party
14.
The number of ____________in the atom of an element determines its chemical properties
a)
atoms
b)
ions
c)
valence electrons
d)
protons
15.
The columns on the periodic table are called __________.
a)
families
b)
periods
c)
groups
d)
elements
16.
What shows the number of valence electrons in an atom _____________?
a)
The science book
b)
Mrs Bidlack
c)
A model
d)
an electron dot diagram
17.
The attractive force that holds two atoms together is called a ________________________
a)
friendship
b)
chemical bond
c)
force
d)
static
18.
Because it can either lose or share electrons when it combines with other elements ___________has some properties of metals and some properties of nonmetals
a)
elements
b)
alkalines
c)
metalloids
d)
noble gases
19.
An atom or group of atoms that has an electric charge is called ___________________
a)
an ion
b)
a molecule
c)
an atom
d)
a valence electron
20.
Ions made of more than one atom are called __________
a)
ionic bonds
b)
polyatomic ions
c)
ionic compounds
d)
ionic atoms
21.
An attraction between two oppositely charged ions is __________
a)
an ionic bond
b)
an ionic compound
c)
polyatomic ions
d)
ionospheres
22.
A compound that results from an ionic bond is called an __________
a)
polyatomic ions
b)
ionic compoud
c)
ionosphere
d)
ionic formula
23.
A group of symbols that show the ratio of elements in a compound is called ____________________
a)
a subscript
b)
a compound
c)
a chemical formula
d)
an ion
24.
What tells the ratio of elements in a compound?
a)
subscript
b)
chemical formula
c)
atomic number
d)
atomic mass
25.
What comes first in an ionic compound?
a)
negative ion
b)
positive ion
c)
element
d)
symbol
26.
Ionic compounds have ____________________
a)
low melting points and malleability
b)
low melting points and ductility
c)
high melting points and conductivity in water
d)
hard, brittle crystals, high melting points and conductivity in water
27.
Which is most likely to form a negative ion?
a)
An element from Group 17
b)
a metal
c)
an element from Group 1
d)
an element with atoms that have eight valence electrons
28.
When an atom loses a valence electron it becomes __________
a)
negative
b)
an ion
c)
positive
d)
an electron
29.
In an ionic compound, the total positive charges ________the total negative charges
a)
is greater than
b)
is less than
c)
equals
d)
jumps on
30.
The chemical bond formed when 2 atoms share electrons is called _______________
a)
a covalent bond
b)
a valence electron bond
c)
a compound bond
d)
a molecule bond
31.
A neutral group of atoms joined by covalent bonds is called _____________________________
a)
a valence electron
b)
a neutral bond
c)
a molecule
d)
an ion
32.
When 2 atoms share 2 pairs of electrons, it is called _______
a)
a chemical bond
b)
a triple bond
c)
a compound bond
d)
a double bond
33.
When 3 electrons are shared, it is called _____________
a)
a triple bond
b)
a double bond
c)
an electron bond
d)
a chemical bond
34.
A compound made of molecules is called _______________
a)
an atomic compound
b)
a molecular compound
c)
a chemical compound
d)
an electrical compound
35.
Most molecular compounds _________________
a)
have conductivity and high melting points
b)
Have comductivity and low melting points
c)
have no conductivity and low boiling points
d)
have low boiling points and high melting points
36.
What is a non polar bond?
a)
a covalent bond in which electrons are shared equally
b)
a covalent bond in which electrons are not shared
c)
a covalent bond in which no sharing takes place
d)
an atomic bond that is shared
37.
A covalent bond in which electrons are shared unequally is __________________________
a)
a nonpolar bond
b)
an electron bond
c)
a polar bond
d)
a nuclear bond
38.
Which is a property of most molecular compounds?
a)
high boiling point
b)
low melting point
c)
nonpolar bonds
d)
alloys
39.
Lithium oxide is an ionic compound with the chemical formula Li2O. What does the 2 tell you?
a)
There are two oxygen ions for each lithium ion
b)
There are two lithium ions for each oxygen ion
c)
There are two magnesium ions for each oxygen ion
d)
There are two oxygen ions for each magnesium ion
40.
What comes first in an ionic compound formula?
a)
The symbol of the positive ion
b)
The symbol of the negative ion
c)
The subscripts
d)
The charges
41.
A mixture made of two or more elements, at least one of which is a metal is called ________________
a)
An ion
b)
A compound
c)
An alloy
d)
A complex metal
42.
Which compounds have a low melting point?
a)
ionic compounds
b)
molecular compounds
c)
metallic compounds
d)
covalent compounds
43.
In a nonpolar bond, electrons are shared _______________
a)
unequally
b)
not at all
c)
equally
d)
always
44.
In a polar bond,
a)
electrons are shared equally
b)
electrons are shared unequally
c)
electrons aren't shared
d)
protons are shared unequally
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