Basic Atomic Structure Practice
1. The 3 particles of the atom are:
a.
b.
c.
Name: _______________________
Their respective charges are:
a.
b.
c.
2. The atomic number tells you the number of _________________in one atom of an element. It
also tells you the number of _________________in a neutral atom of that element. The atomic
number gives the “identity” of an element as well as its location on the periodic table. No two
different elements will have the _________________atomic number.
3. The _________________of an element is the total number of protons and neutrons in the
_________________of the atom.
4. Give the symbol of and the number of protons in one atom of:
Lithium
Iron
Oxygen
Krypton
Bromine
Copper
Mercury
Helium
_________________
_________________
_________________
_________________
_________________
_________________
_________________
_________________
5. Name the element which has the following numbers of particles:
a. 26 electrons, 29 neutrons, 26 protons _________________
b. 53 protons, 74 neutrons _________________
c. 2 electrons (neutral atoms) _________________
d. 20 protons _________________
e. 86 electrons, 125 neutrons, 82 protons _________________
Word Bank for
questions 2-3
mass number
electrons
nucleus
protons
same
6. Fill in the missing items in the table below.
Element
#
#
#
Mass
Charge
Symbol Protons Neutrons Electrons Number
Co
59
+3
0
38
43
9
20
18
-2
21
Ca
Vanadium-52
40
52
53
50
Lead-210
36
10
17
Isotope Hyphen
Notation
(Name – Mass)
+2
0
18
38
38
90
+1
Nuclear Symbol
(MassAtomicXCharge)