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WorksheetsAtoms and the Periodic Table
Total questions: 30
Worksheet time: 39mins
Name
Class
Date
1.
Which of the following is not considered a subatomic particle?
a)
Nucleus
b)
Proton
c)
Neutron
d)
Electron
2.
This subatomic particle has a negative charge
a)
proton
b)
neutron
c)
electron
d)
nucleus
3.
The ______________ is the number of protons + neutrons in the nucleus of an atom.
a)
atomic number
b)
net charge
c)
chemical symbol
d)
atomic mass
4.
Which energy level can hold a maximum of 2 electrons?
a)
K (1st)
b)
L (2nd)
c)
M (3rd)
5.
Which of the following scientists discovered that the atom is mostly empty space?
a)
Rutherford
b)
Democritus
c)
Bohr
d)
Dalton
6.
Which element has 6 protons?
a)
N
b)
C
c)
O
d)
B
7.
Which scientist discovered that electrons are arranged in layers that surround the nucleus?
a)
Dalton
b)
Aristotle
c)
Democritus
d)
Bohr
8.
Atoms of the same element with a different number of neutrons are called
a)
neutral
b)
ions
c)
valence
d)
isotopes
9.
Which of the following subatomic particles is not found in the nucleus?
a)
proton
b)
neutron
c)
electron
10.
This subatomic particle has a positive charge
a)
proton
b)
neutron
c)
electron
d)
nucleus
11.
Changing the number of electrons in an atom will change the atom's _____
a)
atomic number
b)
atomic weight/mass
c)
net charge
d)
identity (name of element)
12.
Which energy level can hold a maximum of 18 electrons?
a)
K (1st)
b)
L (2nd)
c)
M (3rd)
13.
The _____________ is the dense center of the atom
a)
cloud
b)
nucleus
c)
energy level
d)
orbital
14.
This subatomic particle has a neutral charge
a)
proton
b)
neutron
c)
electron
d)
nucleus
15.
How many electrons does an atom with 12 protons and a net charge of +2 have?
a)
14
b)
10
c)
12
d)
0
16.
Which element has 7 protons?
a)
N
b)
Li
c)
O
d)
B
17.
True or False :
An ion is an atom with equal number of protons and electrons.
An ion is an atom with equal number of protons and electrons.
a)
True
b)
False
18.
Which of the following beliefs about the atom did NOT belong to John Dalton?
a)
Atoms have tiny negatively charged particles called electrons.
b)
Atoms are uncuttable (indivisible).
c)
Atoms of the same element are exactly alike.
d)
Atoms of different elements can join to form molecules.
19.
Changing the number of neutrons in an atom will change the atom's _____
a)
atomic number
b)
atomic weight/mass
c)
net charge
d)
identity (name of element)
20.
Which energy level can hold a maximum of 8 electrons?
a)
K (1st)
b)
L (2nd)
c)
M (3rd)
21.
Which energy levels of an atom will electrons fill first?
a)
Low energy levels (close to nucleus)
b)
High energy levels (far away from nucleus)
22.
The only subatomic particle that can be gained or lost in chemical bonding
a)
protons
b)
neutrons
c)
valence electrons
d)
valence protons
23.
What is the net charge of an atom with 10 protons and 15 electrons?
a)
+10
b)
-15
c)
-5
d)
+5
24.
What is the net charge of an atom with 20 protons and 18 electrons?
a)
+2
b)
-18
c)
-2
d)
+20
25.
An atom of fluorine with 10 electrons and 9 protons would be considered to be
a)
neutral
b)
an ion
26.
Calculate the atomic weight/mass of an atom with:
11 protons
10 neutrons
11 electrons
11 protons
10 neutrons
11 electrons
a)
11
b)
21
c)
22
d)
10
27.
Calculate the atomic number of an atom with :
2 protons
3 neutrons
4 electrons
2 protons
3 neutrons
4 electrons
a)
2
b)
3
c)
4
d)
5
28.
_______ was the first scientist to suggest the electrons exist in layers away from the nucleus of an atom.
a)
Aristotle
b)
Dalton
c)
Bohr
d)
Democritus
29.
True or False : It is currently believed (modern atomic theory) that the exact location of an electron in an atom cannot be calculated.
a)
True
b)
False
30.
One atom of sodium has _________ neutrons.
a)
23
b)
12
c)
11
d)
0
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