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Chemistry STAAR Review 1.1

Total questions: 36

Worksheet time: 31mins

Name
Class
Date
1.

how many groups/families are on the table

a)

15

b)

16

c)

17

d)

18

2.

what group number are the noble gases

a)

17

b)

18

c)

14

d)

15

3.
The atomic number tells you what?
a)
number of electrons
b)
number of protons
c)
number of neutrons
d)
both electrons and protons in an atom.
4.
Elements which are shiny, conduct electricity and heat are called
a)
metal
b)
nonmetal
c)
metalloid
d)
nonexistent
5.
The atomic number of this pictured element is
a)
28
b)
58.6934
c)
Ni
d)
Nickel
6.
what does the 6 represent?
a)
Atomic mass
b)
atomic number
c)
chemical symbol
d)
element name
7.
A proton is....
a)
A negatively charged subatomic particle
b)
A positively charged subatomic particle
c)
A neutrally charged subatomic particle
d)
The only subatomic particle located in the nucleus
8.
A neutron has a charge of
a)
+2
b)
No charge
c)
-1
d)
+1
9.
Which is a neutron?
a)
A
b)
B
c)
C
10.
What element is will have the most similar physical and chemical properties to the element Sulfur (S)?
a)
Carbon (C)
b)
Phosphorous (P)
c)
Oxygen (O)
d)
Neon (Ne
11.
Elements that are arranged in __________ have the most similar physical and chemical properties to each other.
a)
periods
b)
groups
12.

What type of charge does an electron have?

a)

positive

b)

no charge/neutral

c)

negative

13.

What is the center of the atom called?

a)

nucleus

b)

electron cloud

c)

energy level

d)

neutron

14.

What two sub-atomic particles belong in the nucleus of an atom?

a)

electrons and protons

b)

protons and neutrons

c)

electrons and neutrons

15.

How do you find the atomic number?

a)

by the number of electrons

b)

by the number of protons

c)

by the number of neutrons

16.

What is the atomic number of this Carbon atom

a)

6

b)

8

c)

14

d)

12

17.

What is the mass number of this Carbon atom?

a)

8

b)

12

c)

6

d)

15

18.

The mass number of an atom =

a)

protons + neutrons

b)

protons - neutrons

c)

electrons - neutrons

d)

neutrons + electrons

19.

How many Hydrogen atoms are in 4H2O?

a)

6

b)

8

c)

2

d)

4

20.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
21.

How many atoms are there TOTAL in H2SO4 ?

a)

6

b)

5

c)

7

d)

3

22.

How many Nitrogen atoms are in (NH₄)₂CrO₄?

a)

1

b)

2

c)

8

d)

16

23.

How many Hydrogen atoms in 3(NH₄)₂CrO₄?

a)

4

b)

2

c)

8

d)

24

24.
Which of the following examples shows that a chemical reaction has occurred? 
a)
A rock breaks into smaller pieces when it is struck with a hammer.
b)
Rust forms on a hammer that has been left outside to long. 
c)
A cup of water turns pink when a few drops of red food coloring are added. 
d)
A solid is formed when heat is removed from a sample of water. 
25.
Hydrogen peroxide breaks down to form water and oxygen gas. Which observation is evidence that a chemical reaction has occurred?
a)
The mass of the solution remains the same.
b)
 Phase changes are observed.
c)
 The color of the solution remains clear.
d)
The temperature of the solution increases. 
26.
A clear liquid from a flask is poured into another clear liquid in a beaker. Which of the following results of this procedure would indicate a new substance was formed?
a)
The level of the substance in the beaker is higher after the other liquid is added.
b)
A yellow solid forms and then settles to the bottom of the beaker.
c)
Small white crystals are left behind in the flask that held the first liquid.
27.
Evidence of a chemical reactions is anything that shows - 
a)
a new substance has formed
b)
a solid dissolved in a liquid
c)
interaction between 2 gases
d)
a change in the state of matter
28.

Chewing food is an example of

a)

chemical digestion

b)

mechanical digestion

29.

Acids and enzymes are used in

a)

Mechanical digestion

b)

chemical digestion

30.
During chemical digestion 
a)
only changes in size and shape occur
b)
a new substance is formed
31.
The chewing and grinding of food into smaller pieces is an example of...
a)
Mechanical Digestion
b)
Chemical Digestion
32.
What two types of measurements make up DENSITY? 
a)
Mass and Volume
b)
Temperature and Mass
c)
Grams and Centimeters
d)
Volume and Weight
33.
Jack has a rock. The rock has a mass of 14g and a volume of 2cm3. What is the density of the rock?
a)
7 mL
b)
7 g/cm3
c)
28 g/cm3
d)
1/7 g/cm3
34.

Helium (He) is an example of an:

a)

Element

b)

Compound

c)

Solution

d)

Mixture

35.

Examples are water (H2O) and carbon dioxide (CO2).

a)

elements

b)

compounds

36.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3

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