WorksheetsHello Atom!!
Total questions: 28
Worksheet time: 16mins
Name
Class
Date
1.
Dalton showed that common substances always broke down into _____
a)
the same elements in the same proportions
b)
elements in equal quantities
c)
hydrogen and oxygen
d)
earth, wind, water and fire
2.
Dalton proposed that atoms _____
a)
could be created and destroyed
b)
could be created but not destroyed
c)
could be destroyed but not created
d)
could neither be created nor destroyed
3.
Dalton concluded that the various compounds were combinations of atoms of different _____
a)
facets
b)
materials
c)
elements
d)
ingredients
4.
The electron was discovered in 1897. Who discovered it?
a)
Ernest Rutherford
b)
John Dalton
c)
J. J. Thomson
d)
Niels Bohr
5.
Whose model showed atoms as uniformly packed spheres of positive matter filled with negatively charged electrons?
a)
J. J. Thomson
b)
John Dalton
c)
Ernest Rutherford
d)
Niels Bohr
6.
Whose experiment involved shooting small, positively charged alpha particles at a sheet of gold foil?
a)
J.J. Thompson
b)
Max Planck
c)
Ernest Rutherford
d)
Niels Bohr
7.
Who concluded that atoms consisted largely of empty space with most of the mass concentrated in the center?
a)
J. J. Thomson
b)
Max Planck
c)
Ernest Rutherford
d)
Niels Bohr
8.
Rutherford referred to the center of the atom, where the mass was concentrated, as _____
a)
the kernel
b)
the nucleus
c)
the focus
d)
the heart
9.
Everything is made up of little tiny things called _____
a)
compounds
b)
molecules
c)
atoms
d)
solids
10.
From the diagram, which particles are indicated with the arrow?
a)
electrons and protons
b)
protons and neutrons
c)
electrons and neutrons
d)
photons and nucleons
11.
These particles orbit around the nucleus of an atom. What are they called?
a)
electrons
b)
protons
c)
neutrons
d)
photons
12.
In terms of matter, the atom is almost entirely filled with _____
a)
orbiting electrons
b)
charged protons
c)
heavy neutrons
d)
empty space
13.
Which of the following is a positively charged subatomic particle found in the nucleus of an atom?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
14.
An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?
a)
15
b)
31
c)
16
d)
47
15.
What carries no charge
a)
Neutrons
b)
Electrons
c)
Protons
16.
What is the Atomic Mass?
a)
6.941
b)
7
c)
3
d)
6
17.
How many Protons are in one atom of Lithium?
a)
3
b)
6
c)
7
d)
6.941
18.
An atom has 5 protons and 7 neutrons. What is the mass number of the atom?
a)
5
b)
7
c)
2
d)
12
19.
An atom has an atomic number of 19 and a mass number of 29. How many neutrons are in the atom?
a)
30
b)
19
c)
10
d)
38
20.
What is the unit used to measure weighted average atomic mass?
a)
amu
b)
gram
c)
angstrom
d)
nanogrm
21.
Components of atoms
a)
quarks
b)
isotpoes
c)
subatomic particles
d)
ions
22.
An element has an atomic number of 76. The number of protons and electrons in a neutral atom of the element are
a)
152 p+, 76 e-
b)
76 p+, 0 e-
c)
38 p+, 38 e-
d)
76 p+, 76 e-
23.
Contributes basically no mass to an atom.
a)
protons
b)
neutrons
c)
electrons
d)
protons and neutrons
24.
An atoms overall charge is
a)
positive
b)
depends on its mood
c)
neutral
d)
negative
25.
How are elements and compounds different?
a)
A compound is a combination of two or more types of matter, an element is one type.
b)
Compounds are represented by chemical symbols of one letter, elements by two.
c)
There are an infinite number of elements, but a limited number of compounds.
d)
Elements are always larger units of matter, and compounds are smaller.
26.
In a neutral atom, what needs to be true?
a)
The number of protons and neutrons are the same
b)
The number of protons and electrons are the same
c)
The number of neutrons and electrons are the same
d)
None of the above
27.
An atom has 10 protons and a mass of 18. It has __ neutrons
a)
10
b)
18
c)
28
d)
8
28.
The element symbol for potassium:
a)
P
b)
Po
c)
Pt
d)
K
100 %
