NEW
Font size
S
M
L
XL
WorksheetsMATTER - Atomic Structure
Total questions: 20
Worksheet time: 13mins
Name
Class
Date
1.
Atoms are the smallest units of matter.
a)
True
b)
False
2.
Which one of the following scientist put forth the atomic theory of matter
a)
Goldstein
b)
Thompson
c)
John dalton
d)
Rutherford
3.
Protons and neutrons can be found:
a)
Inside the nucleus
b)
Orbiting the nucleus
c)
In the electron shell
4.
The two atoms will always have the same atomic number if they have the same
a)
Number of neutrons
b)
Number of protons
c)
Number of nucleons
d)
Mass number
5.
Protons have a positive electrical charge, electrons have a negative charge and neutrons have no charge.
a)
True
b)
False
6.
Every element has an atomic number determined by the number of _______ found in the nucleus.
a)
Neutrons
b)
Electrons
c)
Protons
d)
energy levels
7.
________ has mass is located in the nucleus with no charge.
a)
Proton
b)
Neutron
c)
Electron
d)
Isotope
8.
________ has mass is located in the nucleus with a positive charge.
a)
Proton
b)
Neutron
c)
Electron
d)
Isotope
9.
The atomic mass of an atom is the total mass of all of its protons, electrons and Neutrons.
a)
True
b)
False
10.
________ has insignificant mass is located outside the nucleus with negative charge.
a)
Proton
b)
Neutron
c)
Electron
d)
Isotope
11.
An element with an atomic number of 19 has an atomic mass of 40; how many neutrons does it have?
a)
20
b)
19
c)
59
d)
21
12.
The number of electrons in an atom is equal to number of
a)
nucleons in a neutral atom
b)
neutrons in a neutral atom
c)
protons in a neutral atom
d)
none of the above
13.
The outermost shell of an atom is known as
a)
Nucleus
b)
Valence shell
c)
bound shell
d)
penultimate shell
14.
Which of the following correctly represent the electronic configuration of Mg atom
a)
3,8,1
b)
8,2,2
c)
2,8,2
d)
1,8,3
15.
How many valence electrons are represented here?
a)
7
b)
5
c)
2
d)
8
16.
An atom of an element has 3 electrons in its 3rd orbit, then its electronic configuration is
a)
2,8,8
b)
2,8,3
c)
2,3,8
d)
3,2,8
17.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
18.
The energy of an electron __________ as it moves further away from the nucleus
a)
increases
b)
decreases
c)
remains the same
19.
What is the maximum number of electrons in the second energy level?
a)
18
b)
8
c)
32
d)
2
20.
How many valence electrons does Si contain?
a)
14
b)
28
c)
2
d)
4
Reset
