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WorksheetsBohr and atomic structure
Total questions: 20
Worksheet time: 23mins
Name
Class
Date
1.
What is the tiny, massive central part of the atom?
a)
Neutron
b)
Electron
c)
Proton
d)
Nucleus
2.
Who discovered the nucleus of an atom?
a)
JJ Thomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
3.
What are electrons?
a)
Massive, positively charged particles
b)
Tiny, negatively charged particles
c)
Clouds of dust in the nucleus
d)
Neutral particles around the nucleus
4.
Whose model is most similar to the solar system?
a)
Bohr
b)
Thomson
c)
Rutherford
d)
Dalton
5.
What element is represented in this Bohr Model?
a)
Carbon
b)
Hydrogen
c)
Aluminum
d)
Lithium
6.
How many electrons does potassium K contain?
a)
19
b)
39
c)
20
d)
40
7.
How many electrons are in the outer most shell of Sodium (Na)?
a)
3
b)
1
c)
2
d)
4
8.
What identifies the element?
a)
Protons
b)
Neutrons
c)
valence electrons
d)
Nucleus
9.
Which following atom has the biggest mass?
a)
Hydrogen
b)
Helium
c)
Boron
d)
Argon
10.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
11.
How many electrons are in the outer most level of Carbon?
a)
4
b)
8
c)
6
d)
2
12.
The first element on the periodic table is:
a)
Hydrogen
b)
Helium
c)
Oxygen
d)
Lithium
13.
Which of these have 8 outer most level electrons?
a)
Carbon
b)
Helium
c)
Neon
d)
Boron
14.
Which of these has 6 outer most level electron?
a)
Carbon
b)
Lithium
c)
Neon
d)
Oxygen
15.
How many total electrons does element 15 have?
a)
5
b)
2
c)
8
d)
15
16.
When an element loses an electron, it becomes a
a)
ion
b)
isotope
c)
decay
d)
new element
17.
When an element loses an electron, it becomes?
a)
positive
b)
negative
c)
neutral
d)
a new element
18.
When an atom gains an electron, it becomes-
a)
negative
b)
postive
c)
neutral
d)
a new element
19.
Which of these is an alkali metal?
a)
Na
b)
Mg
c)
Cl
d)
Ar
20.
Which of these has 7 outer most level electrons?
a)
C
b)
N
c)
O
d)
F
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