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Worksheetschemistry 6th-8th
Total questions: 15
Worksheet time: 11mins
Name
Class
Date
1.
What are the 3 particles that make-up the atom?
a)
protons, neutrons, and isotopes
b)
neutrons, isotopes, and electrons
c)
positives, negatives, and electrons
d)
protons, neutrons, and electrons
2.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
3.
are electrons negatively charged ?
a)
true
b)
false
4.
how many protons are in Ca
a)
20
b)
23
c)
55
d)
78
5.
what is it ?
a)
element
b)
atoms
c)
periodic table
d)
molecules
6.
"C" is the element symbol for which element?
a)
calcium
b)
carbon
c)
chlorine
d)
cadmium
7.
True or False? Neutrons have a negative charge
a)
True
b)
False
8.
If I gain electrons I become
a)
Positive because I've added to my atom
b)
negative because I've added electrons
c)
same because i'm balanced
d)
equal because now I have electrons
9.
An isotope of an element has the same number of _________, but a different number of _________.
a)
Protons, electrons
b)
Protons, neutrons
c)
Electrons, neutrons
10.
What is the mass number of Chlorine-37 (Cl)?
a)
17
b)
37
c)
7
d)
35.45
11.
What 3 subatomic particles make up atoms?
a)
Isotopes, protons, covalent bonds
b)
quarks, quirks, compounds
c)
protons, neutrons, isotopes
d)
protons, neutrons, electrons
12.
The isotopes of an element all have the same number of:
a)
electrons
b)
neutrons
c)
protons
13.
A chemical ________ is a pure substance made entirely of 1 type of atom.
a)
element
b)
compound
c)
mixture
d)
blend
14.
The nucleus of an atom usually contains:
a)
protons and neutrons
b)
electrons
c)
electrons and protons
d)
isotopes
15.
The one or two letters used to represent elements
a)
Yield sign
b)
Coefficient
c)
Symbol
d)
Subscript
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