WorksheetsAtoms, Ions, Isotopes
Total questions: 36
Worksheet time: 25mins
Name
Class
Date
1.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
2.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
3.
The subatomic particle with a negative charge is the
a)
electron
b)
proton
c)
neutron
d)
nucleus
4.
If the number of protons equal the number of _____, the atom will have no charge
a)
protons
b)
neutrons
c)
electrons
d)
nucleus
5.
What is the atomic number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
6.
What is the mass number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
7.
An atom with an unequal number of protons and electrons is said to have (a) ___.
a)
no charge
b)
balance
c)
charge
d)
unbalance
8.
Ions are:
a)
atoms with a positive or negative charge
b)
atoms with no charge
c)
atoms with ONLY a positive charge
d)
atoms with ONLY a negative charge
9.
Two atoms of the same element but with different mass numbers are called________
a)
electrons
b)
isotopes
c)
variables
d)
electron cloud
10.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
11.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
12.
What does the number 11 stand for in the Sodium block?
a)
atomic number
b)
atomic weight
c)
Stranger Things
13.
What does the K stand for in the Potassium block?
a)
Atomic number
b)
Atomic weight
c)
Symbol for the atom
14.
What does the 40.08 stand for in the Calcium block?
a)
Atomic number
b)
Atomic mass
c)
Atomic symbol
15.
When an atom loses a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
16.
When an atom gains a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
17.
Atoms are most stable when their outer shell is filled with electrons.
a)
true
b)
false
18.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
19.
What is the charge of an atom that has gained two electrons?
a)
-1
b)
-2
c)
+1
d)
+2
20.
How many electrons will a neutral potassium atom lose to become stable?
a)
1
b)
2
c)
8
d)
7
21.
How many total electrons does O-2 (an oxide ion) have?
a)
8
b)
10
c)
6
d)
18
22.
How many total electrons does Mg+2 (a magnesium ion) have?
a)
10
b)
12
c)
14
d)
22
23.
Cations are
a)
positive
b)
negative
c)
on the right side of the periodic table.
d)
nonmetals
24.
an atom with atomic number 6 would have how many protons
a)
6
b)
12
c)
3
d)
cannot be determined
25.
Anions are...
a)
Positive
b)
Negative
c)
Neutral
26.
Fluorine has an atomic number of 9. What can you conclude about an atom of fluorine from this fact?
a)
it has 9 protons
b)
it weighs 9 grams
c)
it has 9 electron shells
d)
it has a boiling point of 9 degree celsius
27.
An atom of fluorine has an atomic mass of 19 u. Keeping in mind that its atomic number is 9, what can you infer about this atom?
a)
it has 9 neutrons
b)
it has 10 electrons
c)
it has 10 neutrons
d)
it has 10 protons
28.
If a sulfur atom has 16 protons, 16 electrons, and 16 neutrons, its atomic mass is:
a)
16
b)
32
c)
48
d)
64
29.
On the periodic table, how is atomic mass represented?
a)
As an average of the mass of different isotopes
b)
as the exact mass of every atom
c)
as the mass of the most common isotopes
d)
As the masses of all protons added together
30.
What do carbon-12 and carbon-14 have in common?
a)
they have same number of protons
b)
they have the same number of neutrons
c)
they have the same atomic mass
d)
they have the same atomic weight
31.
How is carbon-12 different from carbon-14?
a)
They have a different number of protons
b)
they have a different number of electrons
c)
they have a different number of neutrons
d)
they are different elements
32.
What can you conclude about carbon-14 from its name?
a)
It has 14 electrons
b)
it has 14 neutrons
c)
it has 14 protons
d)
it has an atomic mass of 14 u
33.
How many neutrons in C-14?
a)
6
b)
7
c)
14
d)
8
34.
How many neutrons does the isotope below have? 89 36Kr
a)
53
b)
36
c)
89
d)
125
35.
9 protons and 9 neutrons
a)
Fluorine-18
b)
Fluorine-9
c)
Fluorine-16
d)
Fluorine-18.998
36.
The relative mass of an electron is...
a)
1
b)
2
c)
0
d)
3
100 %
