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WorksheetsAtomic Structure
Total questions: 30
Worksheet time: 15mins
Name
Class
Date
1.
Where is the proton located?
a)
Electron Cloud
b)
Nucleus
2.
Which subatomic particle is so small we consider it to have no mass?
a)
proton
b)
nuetron
c)
electron
3.
Atomic mass is the sum of
a)
protons and neutrons
b)
protons and electrons
c)
electrons and neutrons
4.
The atomic number is ALWAYS equal to
a)
the number of electrons
b)
the number of protons
c)
the number of electrons
5.
Where is the neutron located?
a)
electron cloud
b)
nucleus
6.
What kind of charge do electrons have?
a)
negative
b)
neutral
c)
positive
7.
Isotopes have the same number of _________ but different number of ____________.
a)
electrons, neutrons
b)
protons, electrons
c)
electrons, protons
d)
protons, neutrons
8.
Who first developed the idea of the atom?
a)
Niel Bohr
b)
Aristotle
c)
Democritus
d)
John Dalton
9.
A positively charged ion is called
a)
cation
b)
anion
10.
Where is the electron located?
a)
nucleus
b)
electron cloud
11.
What is the charge of a neutron?
a)
positive
b)
negative
c)
neutral
12.
Ions have the same number of ___________ but different number of ____________ than a neutral atom of the same element.
a)
protons, neutrons
b)
protons, electrons
c)
electrons, neutrons
d)
neutrons, electrons
13.
If you change the number of protons in an atom, what happens?
a)
You form an isotope of the same element
b)
You change the identity of the element
c)
You form an ion of the same element
14.
If you change the number of neutrons in an atom, what happens?
a)
You form an isotope of the same element
b)
You change the identity of the element completely
c)
You form an ion of the same element
15.
If you change the number of electrons in atom, what happens?
a)
You form an isotope of the same element
b)
You change the identity of the element completely
c)
You form an ion of the same element
16.
What does the bigger number in an element's symbol always represent?
a)
The atom's proton number
b)
The atom's mass
17.
Who developed the plum pudding model of the atom, discovering the electron?
a)
Bohr
b)
Rutherford
c)
J.J. Thomson
d)
Chadwick
18.
Who performed the gold foil experiment confirming the existence of the nucleus?
a)
Rutherford
b)
J.J. Thomson
c)
Chadwick
d)
Bohr
19.
Who said that electron's orbit the nucleus in energy levels like planets orbit the sun?
a)
Democritus
b)
Dalton
c)
J.J. Thomson
d)
Neil Bohr
20.
Who is credited with the discovery of the neutron?
a)
Dalton
b)
Rutherford
c)
Bohr
d)
Chadwick
21.
Who wrote the atomic theory (5 statements about atoms and matter)
a)
Rutherford
b)
Aristotle
c)
Dalton
d)
Democritus
22.
Which element has an atomic number of 26?
a)
Iron (Fe)
b)
Copper (Cu)
c)
Chromium (Cr)
d)
Cobalt (Co)
23.
Which element has an atomic mass of 40?
a)
Potassium (K)
b)
Zirconium (Zr)
c)
Calcium (Ca)
d)
Scandium (Sc)
24.
How many protons does Nickel (Ni) have?
a)
59
b)
27
c)
20
d)
28
25.
How many neutrons does Argon (Ar) have?
a)
40
b)
18
c)
22
d)
19
26.
A negatively charged ion is called
a)
cation
b)
anion
27.
An atom that does not have the same number of protons and electrons is called
a)
An isotope
b)
A neutral atom
c)
An ion
28.
What is the charge of Aluminum if it has 13 protons and 10 electrons
a)
+1
b)
-1
c)
+3
d)
-3
29.
What is the charge of Calcium if it has 20 protons and 18 electrons?
a)
+2
b)
-2
c)
+1
d)
-1
30.
What is the charge of Chlorine if it has 17 protons and 18 electrons
a)
+1
b)
-1
c)
+3
d)
-3
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