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Structure of Atom chem9

Total questions: 20

Worksheet time: 14mins

Name
Class
Date
1.
Which particle has a positive charge?
a)
electron
b)
orbital
c)
proton
d)
neutron
2.
What are the maximum number of electrons that go on the first 3 energy levels?
a)
2,4,16
b)
2,8,18
c)
4,8,12
d)
3,4,6
3.
What is the mass number and name of an element with 8 protons and 8 neutrons?
a)
16 - Carbon
b)
16 - Oxygen
c)
24 - Oxygen
d)
8 - Neon
4.
An element with a mass number of 10 and an atomic number of 6 has how many protons?
a)
5
b)
8
c)
6
d)
10
5.
What is the atomic mass of the atom pictured? 
a)
11
b)
12
c)
22
d)
23
6.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
Electrons and megatrons
7.
How many protons, electrons and neutrons does an neutral atom of Calcium have?  Its atomic number is 20 and the mass number is 40.
a)
20 protons, 18 electrons and 40 neutrons
b)
20 protons, 20 electrons and 20 neutrons
c)
40 protons, 40 electrons and 20 neutrons
d)
20 protons, 18 electrons and 20 neutrons
8.
Which of the following people said the atom was a solid sphere?
a)
Dalton
b)
Thompson
c)
Rutherford
d)
Bohr
9.
Ag--110 and Ag--112 are two forms of silver with different mass # so they are
a)
compounds
b)
isotopes
c)
orbitals
d)
neutrons
10.
a)
Electrons that are inside the nucleus
b)
Electrons on the outermost energy level 
c)
Electrons that are closest to the nucleus
d)
Electrons that have a positive charge
11.
a)
Positive, electron cloud
b)
Neutral, nucleus
c)
Negative, electron cloud
d)
Negative, nucleus
12.
In an atom, what is the number of protons equal to?
a)
The number of electrons.
b)
The number of neutrons.
c)
The number of molecules.
d)
The number of nuclei.
13.
 What is the mass number of this element?
a)
5
b)
27
c)
32
d)
59
14.

A certain atom has 26 protons, 26 electrons, and 30 neutrons. What is its mass number?

a)

26

b)

30

c)

52

d)

56

15.

If a carbon atom has six protons and has a mass of 13 amu, how many neutrons are in that carbon atom?

a)

5

b)

6

c)

7

d)

8

16.

Rutherford concluded that the amount of positive charge varies

a)

with the amount of electrons in the nucleus.

b)

as the the amount of isotopes varies.

c)

with the amount of neutrons in the nucleus.

d)

with different elements.

17.

Neutrons (discovered by James Chadwick in 1932) are neutral subatomic particles that are located

a)

in and outside the nucleus.

b)

in the nucleus.

c)

just outside the nucleus.

d)

in alternate universes.

18.

Only protons & neutrons can be distinguished by mass, charge and position in an atom.

a)

True

b)

False

19.

James Dalton proved that the true nature of the atom could best be described as resembling "plum pudding."

a)

True

b)

False

20.
What number indicates an electron?
a)
1
b)
2
c)
3
d)
4

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