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Chemistry S1S2S3

Total questions: 21

Worksheet time: 17mins

Name
Class
Date
1.
What is a reactant?
a)
The starting substance
b)
The ending substance
2.
Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the reactant(s).
a)
Hydrogen and Oxygen
b)
water
3.
What is a precipitate?
a)
a change in color 
b)
a change in temperature
c)
a solid formed
d)
a gas formed
4.
a student mixes  apple juice, water, and cinnamon together. Did a chemical reaction occur?
a)
Yes, because the apple juice changed the color of the water.
b)
yes, because the temperature stayed the sam
c)
no, because the properties stayed the same.
d)
yes, because dissolving is always a chemical reaction.
5.
Burning is always a chemical reaction.
a)
True
b)
false
6.

An electron is

a)

positively charged

b)

neutral

c)

negatively charged

7.

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

8.

Signs of a chemical change include;

a)

change of colour, change of temperature, precipitate (solid) formed, gas released.

b)

change of colour, reversing back to original form, precipitate (solid) formed, gas released.

9.

bases are the same as an acid

a)

true

b)

false

10.
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
11.
Most of the mass in an atom is made up of _____________________?
a)
protons and electrons
b)
protons and neutrons
c)
neutrons and electrons
d)
electrons and quarks
12.
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
13.

What is the number of protons that the element in this image contain?

a)

14

b)

7

c)

15

d)

18

14.

How do the following two elements bond together?

Al3+ O2-

a)

AlO

b)

Al2O3

c)

Al3O6

d)

Al3O2

15.

which compound is made up of carbons and hydrogen

a)

hydrocarbons

b)

aldehytes

c)

condensed structure

d)

alcohols

16.

which bond does carbon mostly form

a)

hydrogen bond

b)

dipole-dipole

c)

covalent bond

17.

Which of the following could be the chemical formula for a compound?

a)

Na

b)

CO2

c)

H2 + O2

d)

Au

18.

The nucleus of an atom contains which of the following subatomic particles?

a)

Electrons

b)

Protons

c)

Neutrons

19.

How many atom of Carbon are in C9H8O4

a)

1

b)

8

c)

12

d)

9

20.

How many elements are in 6NaOH ?

a)

4

b)

6

c)

3

d)

1

21.

In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?

a)

H3PO4

b)

H2SO4

c)

H2O2

d)

H2O

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