WorksheetsCHEMISTRY
Total questions: 8
Worksheet time: 4mins
Name
Class
Date
1.
What is a reactant?
a)
The starting substance
b)
The ending substance
2.
What is a product?
a)
The starting substance
b)
The ending substance
3.
Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the reactant(s).
Hydrogen + Oxygen --> water
Identify the reactant(s).
a)
Hydrogen and Oxygen
b)
water
4.
An electron is
a)
positively charged
b)
neutral
c)
negatively charged
5.
atomic number is
a)
the number of protons
b)
the number of electrons
c)
the number of neutrons
d)
the location of an atom on the periodic table
6.
The element Tellurium has the atomic mass of 127.60 and its atomic number is 52. How many neutrons are in the element Tellurium?
a)
179.60
b)
127.60
c)
52
d)
76
7.
The ________________ tells you how many energy levels are used in an element.
a)
group number
b)
atom
c)
protons
d)
period number
8.
The group number tells us how many _________ there are in an element.
a)
groups
b)
valence electrons
c)
energy levels
d)
chemicals
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