WorksheetsAtomic Structure
Total questions: 32
Worksheet time: 16mins
Name
Class
Date
1.
All elements are composed of
a)
molecules
b)
atoms
c)
neutrons
d)
compounds
2.
Components of atoms
a)
quarks
b)
isotpoes
c)
subatomic particles
d)
ions
3.
The dense center region of an atom
a)
electron cloud
b)
core
c)
nucleus
d)
centrino
4.
Subatomic particle that determines the identity of the atom
a)
proton
b)
nucleus
c)
electron
d)
neutron
5.
Atoms of the same element must always have the same number of _________
a)
electrons
b)
neutrons
c)
isotopes
d)
protons
6.
The number of protons is equal to the
a)
atomic mass
b)
atomic number
c)
atomic structure
d)
atomic link
7.
Where are protons located in an atom?
a)
nucleus
b)
electron cloud
c)
neutron
d)
who knows?
8.
Where are neutrons located within an atom?
a)
nucleus
b)
electron cloud
c)
neutron
d)
who knows?
9.
Where are electrons located in an atom?
a)
nucleus
b)
electron cloud
c)
neutron
d)
who knows?
10.
The atomic mass of a single atom is
a)
the sum of the protons and neutrons in the atom.
b)
twice the number of protons in one atom of the element.
c)
a ratio based on the mass of a carbon-12 atom.
d)
a weighted average of the masses of the element’s isotopes.
11.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
12.
What is the atomic mass (rounded to the nearest whole number) of this element
a)
196
b)
196.95
c)
197
d)
79
13.
Isotopes are elements with a different amount of
a)
protons
b)
neutrons
c)
electrons
d)
atoms
14.
Hydrogen has 1 proton. It's atomic number is:
a)
0
b)
1
c)
2
d)
cannot be determined
15.
An atom has 10 protons and a mass of 18. It has __ neutrons
a)
10
b)
18
c)
28
d)
8
16.
The charge on an ion is
a)
always positive.
b)
always negative.
c)
either positive or negative.
d)
zero.
17.
Which particle is negatively charged?
a)
proton
b)
atom
c)
neutron
d)
electron
18.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
19.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
20.
All atoms of the same element have the same
a)
number of neutrons
b)
number of protons
c)
mass number
d)
mass
21.
How many electrons would an atom of Krypton have?
a)
83.80
b)
36
c)
12
d)
none
22.
The max number of electrons for each level in a Bohr model are
a)
2, 6, 8, 32
b)
2, 8, 18, 32
c)
2, 10, 18, 32
d)
2, 8, 2,8
23.
What is the atomic number of an element with 12 protons, 13 neutrons and 12 electrons?
a)
12
b)
13
c)
25
d)
24
24.
What is the mass of a proton?
a)
about 1/1800th of an amu
b)
0 amu
c)
1 amu
d)
2/3 amu
25.
How many protons are in an atom of carbon?
a)
12.01
b)
8
c)
6
d)
14
26.
How many electrons does a neutral carbon atom have?
a)
0
b)
2
c)
14
d)
6
27.
Changing the number of electrons in an atom changes its...
a)
element type.
b)
charge.
c)
isotope type.
d)
atom type.
28.
When there are the same number of protons and electrons in an atom, that atom is a...
a)
positive ion.
b)
negative ion.
c)
unstable isotope.
d)
neutral atom.
29.
Which of these would change an atom into a different element?
a)
Change the number of neutrons.
b)
Change the number of protons.
c)
Change the number of electrons.
30.
If the number of electrons in an atom changes you make a(n) __________________.
a)
ion
b)
isotope
c)
new element
d)
isomer
31.
An atom with an unequal number of protons and electrons is said to have (a) ___.
a)
no charge
b)
balance
c)
charge
d)
unbalance
32.
When there are more protons than electrons in an atom it is a...
a)
positive ion.
b)
negative ion.
c)
unstable isotope.
d)
neutral atom.
100 %
