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Worksheets

Blue Physics unit

Total questions: 47

Worksheet time: 42mins

Name
Class
Date
1.

What is the chemical formula of Magnesium chloride?

a)

MgCl

b)

MgCl2

c)

MgC

d)

MgC2

2.

How many atoms of sulfur are in each molecule of H2SO4?

a)

1

b)

4

c)

2

d)

7

3.

How many atoms of hydrogen are in a molecule of glucose (C6H12O6)?

a)

12

b)

6

c)

18

d)

4

4.

Which of the following statements accurately describes the number of atoms in a molecule of ammonia (NH3)?

a)

Three atoms of nitrogen and three atoms of hydrogen

b)

One atom of nitrogen and three atoms of hydrogen

c)

Three atoms of nitrogen and one atom of hydrogen

d)

One atom of nitrogen and one atom of hydrogen

5.

Based on the diagram of molecule 5, what is the identity of the compound?

a)

Hydrogen peroxide (H2O2)

b)

Hydronium (H3O+)

c)

Hydroxide (OH-)

d)

Water (H2O)

6.

Which of these formulas contain equal numbers of nitrogen atoms?

a)

Formulas I and III

b)

Formulas I and IV

c)

Formulas I, II and V

d)

Formulas II and III

7.
Which of the following is NOT a step in forming an ionic bond?
a)
One atom shares its electrons with another one.
b)
Opposite charged ions form due to e- transfer
c)
One atom gives electrons to another one
d)
Opposite charged ions attract
8.
Why do ionic bonds form?
a)
So the number of protons equals the number of electrons.
b)
To stabilize the atom with a full outer shell.
c)
So an atom can become unstable.
d)
So atoms will stick together to form molecules.
9.
An ionic bond is the attraction between:
a)
oppositely charged ions
b)
similarly charged ions
c)
neutral ions
d)
neutral atoms
10.
What type of elements will form an ionic bond?
a)
Metals + Metals
b)
Nonmetals + Nonmetals
c)
Metals + Nonmetals
d)
None of the above
11.
Metals tend to 
a)
gain electrons
b)
lose electrons
12.
How many valence electrons does nitrogen have?
a)
3
b)
2
c)
5
d)
1
13.

What bond is formed between a metal and a nonmetal?

a)

Covalent bond

b)

Ionic bond

c)

Hydrogen bond

d)

Metallic bond

14.
How many Valence Electrons are on Oxygen
a)
2
b)
7
c)
6
d)
1
15.
Which of the following describes covalent bonds?
a)
Bonds form because of opposite charges
b)
Bonds form to fill outer electron shells
c)
Electrons are transferred between atoms
d)
Covalent bonds are magical
16.
Protons have a charge of:
a)
-1
b)
+1
c)
-2
d)
+2
17.
Electrons have a charge of:
a)
-1
b)
-2
c)
+1
d)
+2
18.
What would you name this molecule?
a)
SNa3
b)
H3O
c)
NaCl
d)
H2O
19.

A chemical change is different than a physical change because in a chemical change

a)

chemicals are used

b)

molecules do not physically touch

c)

a new substance is formed and in a physical no new substance is formed

d)

the change can be seen but in a physical change it cannot

20.

Which of the following 2 are chemical reactions?

a)

sugar dissolving in water

b)

water turning into steam

c)

burning wood

d)

mixing baking soda and vinegar

e)

tearing paper

21.

How many Hydrogens are on the product side of this chemical equation?

a)

1

b)

2

c)

3

d)

4

22.

How many Carbons are present on the reactant side?

a)

1

b)

2

c)

3

d)

4

23.

Why are chemical equations always balanced? Select ALL that apply.

a)

Matter cannot be created.

b)

Matter cannot be destroyed.

c)

Matter can only be rearranged/conserved.

d)

Matter doesn't matter.

24.

In a chemical reaction, if the reactants are heated, the reaction usually happens

a)

slower

b)

faster

c)

at the same rate

d)

in a smaller volume

25.

Some chemical reactions require a substance called a catalyst. The purpose of a catalyst is

a)

to warm up the reaction

b)

to speed up the reaction

c)

to create more reactants

d)

to stop the reaction

26.
At which point(s) on the roller coaster is the gravitational potential energy at its maximum?
a)
A
b)
B
c)
C
d)
D
27.
At which point(s) on the roller coaster is the kinetic energy at its maximum?
a)
A
b)
B
c)
C
d)
D
28.

In an exothermic chemical reaction, the energy gained by the surroundings must be ___________________ to the energy lost by the reaction?

a)

equal to

b)

greater than

c)

less than

d)

Found and aggressively worked with.

29.
The substance being dissolved in a solution.
a)
sands
b)
solute
c)
solvent
d)
alloy
30.
Solutions are composed of __________ .
a)
salts and solutes
b)
solvents and salts
c)
solutes and alloys
d)
solutes and solvents
31.
What is a compound? 
a)
 the simplest form of a substance 
b)
a combination only of 3 elements 
c)
a combination of 2 or more elements 
d)
a place where people are held 
32.

What is the simplest form of matter that cannot be broken down to anything simpler?

a)

element

b)

solution

c)

compound

d)

Atom

33.

Water is the universal ____.

a)

solute

b)

solvent

c)

solution

d)

Float

34.

Which of these pH values represent an acid?

a)

4

b)

8

c)

10

d)

12

35.

If I add more water to this setup, what will happen to the pH?

a)

It will increase and get closer to 7

b)

It will decrease and get closert to 0

c)

It will stay the same and not change

d)

The whole operation will blow up.

36.

Milk is a very weak acid. What might its pH value be?

a)

6.5

b)

7.8

c)

4.2

d)

12.2

37.

Which of the following are properties of acids?

a)

They conduct electricity when dissolved in water

b)

They taste sour

c)

They react with metals to produce hydrogen gas

d)

All of the answer choices are correct

38.

Which of the following is a property of a base?

a)

bitter taste

b)

reacts with metals

c)

salty

d)

sour taste

39.

Bases have many uses. They are mainly used to make

a)

cleaning products

b)

soaps

c)

concrete

d)

all of the answer choices

40.

Bases have many uses. They are mainly used to make

a)

cleaning products

b)

soaps

c)

concrete

d)

all of the answer choices

41.

Which of the following pH values represents a base?

a)

2.1

b)

4.6

c)

6.8

d)

8.1

42.

Ocean water is only slightly basic. What might its pH value be?

a)

5

b)

8

c)

12

d)

2

43.

One thing you know Mr. O likes?

4 lines
44.

One thing Mr. O' does not like?

4 lines
45.

What show do you think Mr. O' loves to watch

4 lines
46.

Who would you most like to eat Hamburgers with?

4 lines
47.

What is one show you are really enjoying right now?

4 lines

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