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WorksheetsAtomic Structure
Total questions: 25
Worksheet time: 18mins
Name
Class
Date
1.
all matter is made of what
a)
energy
b)
atoms
c)
electrons
d)
compounds
2.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
3.
the central region of an atom where its neutrons and protons are is its
a)
nucleus
b)
electron cloud
c)
core
d)
center
4.
an atom with atomic number 6 would have how many protons
a)
6
b)
12
c)
3
d)
cannot be determined
5.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
6.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
7.
What is the atomic mass of "F"
a)
9
b)
18
c)
17
d)
19
8.
What is the atomic number for an element with three protons?
a)
2
b)
1
c)
3
d)
6
9.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
10.
In the modern periodic table elements are arranged by:
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
11.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
12.
Where are electrons of an atom found?
a)
Nucleus
b)
Electron Cloud
c)
Some are in the nucleus and some in the electron cloud.
d)
They are moving everywhere.
13.
Two atoms of the same element but with different mass numbers are called________
a)
electrons
b)
isotopes
c)
variables
d)
electron cloud
14.
What is the chemical symbol for the element hydrogen
a)
H
b)
He
c)
h
d)
he
15.
What is the chemical symbol for the element Carbon
a)
ca
b)
co2
c)
C
d)
Cd
16.
What is the chemical symbol for the element copper?
a)
co
b)
c
c)
Cu
d)
cu
17.
What is the chemical symbol for the element Nitrogen
a)
Ni
b)
N
c)
No
d)
Nb
18.
What is the chemical symbol for the element oxygen
a)
O
b)
Oxy
c)
ox
d)
Oy
19.
The smallest part of an element is
a)
proton
b)
atom
c)
compound
d)
mixture
20.
An example of matter made of only one element is
a)
water
b)
gold bar
c)
light bulb
d)
salad mixture
21.
Examples are milk and gasoline.
a)
elements
b)
mixtures
c)
compounds
22.
What is a mixture?
a)
elements chemically combined
b)
a combination of different substances
c)
composed of one atom only
d)
it is made of chemical
23.
Is salt (NaCI) a compound or a element
a)
Compound
b)
element
24.
Which of the following selections are the different types of mixtures?
a)
heterogenous, homogenous
b)
acid, base
c)
metal, nonmetal
d)
element, compound
25.
Which of the following lists only elements?
a)
H2O + OH, MgCl2
b)
H2O, KF, Ne
c)
KCl, Ag, Au
d)
K, Cl, N
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