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Phys Sci Semester 2 EOC Review Pt. 2

Total questions: 56

Worksheet time: 48mins

Name
Class
Date
1.

Hydrogen is element number 1. If you were given an atom of Hydrogen with a mass of 1 amu, how many neutrons does it have?

a)

0

b)

1

c)

2

d)

3

2.

What is the mass of an atom of hydrogen that has 1 neutron?

a)

0 amu

b)

1 amu

c)

2 amu

d)

3 amu

3.

How many valence electrons are in the atom above?

a)

2

b)

6

c)

10

d)

16

4.

How many valence electrons does Lithium have? You may want to look at a periodic table.

a)

1

b)

2

c)

3

d)

4

5.

How many valence electrons do most elements (that we learned about) want to have in their outer shells?

a)

1

b)

2

c)

5

d)

8

6.
How many electrons does oxygen (O) need to gain to become stable?
a)
1
b)
2
c)
3
d)
4
7.

Exceptions to the octet rule include...

a)

H and He

b)

N and O

c)

F and Fr

d)

Ne and Ar

8.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
9.

An atom with 3 valence electrons "wants" a full outer shell, so it can either gain 5 or lose 3. Which is more likely to occur?

a)

Gain 5

b)

Lose 3

c)

Nothing

10.
How many valence electrons are represented here?
a)
7
b)
5
c)
2
d)
8
11.

How many electrons can the second energy level hold?

a)

1

b)

2

c)

8

d)

0

12.

An electron has what kind of charge?

a)

no charge

b)

positive

c)

negative

d)

it depends

13.

a proton has what charge?

a)

positive

b)

negative

c)

no charge

d)

it depends

14.

When the number of electrons equals the number of protons the atom has what charge?

a)

sponge bob

b)

positive charge

c)

negative charge

d)

neutral charge

15.

An atom that has gained or lost electrons is called ...

a)

a winner

b)

an isotope

c)

an ion

d)

a loser

16.

Atoms that lose electrons become...

a)

negatively charged

b)

postively charged

c)

remain neutral, no charge

d)

losers

17.

Atoms that gain electrons become...

a)

negatively charged

b)

positively charged

c)

remain neutrally charged

d)

21

18.

If an oxygen atom has 8 protons (+) and 10 electrons (-), what is it's charge?

a)

O10-

b)

O8+

c)

O2-

d)

O10+

19.

An ionic bond is the attraction between:

(choose all correct answers)

a)

oppositely charged ions

b)

similarly charged ions

c)

two metal ions

d)

A metal ion and a non-metal ion

20.
What two types of atoms make a covalent bond?
a)
2 Nonmetals
b)
1 Nonmetal and 1 Metal
c)
2 Metals
d)
2 Noble Gases
21.

How do covalent bonds form?

a)

Atoms taking other atom's electrons

b)

Opposite slight charges attract each other between compounds.

c)

Scientists are still not sure how they form.

d)

Sharing valence e- between atoms.

22.

What kind of bond are shown here?

a)

covalent single bonds

b)

covalent double bonds

c)

ionic bonds

d)

metallic bonds

23.
Prefixes are used only for _______________ compounds
a)
Ionic
b)
covalent
24.

Name this compound.

MgF2


(make note of what kind of bond it is...)

a)

magnesium fluoride

b)

manganese Phosphide

c)

magnesium difluoride

d)

dimagnesium fluoride

25.
Name this compound.
N2O4
a)
dinitrogen tetroxide
b)
dinickel tetroxide
c)
nitrogen oxide
d)
nickel oxide
26.
Which of the following models best demonstrates a balanced chemical equation?
a)
F
b)
G
c)
H
d)
J
27.
Which of the following is true about the atoms involved in a chemical reaction?
a)
The same number of each type of atom will be present before and after a chemical reaction
b)
Some of the atoms present before the reaction will be lost during a chemical reaction
c)
Some of the atoms will be hcanged into a different type of atom by a chemical reaction
d)
During a chemical reaction, atoms will always be combined into much larger molecules
28.
In a ___________change, a substance changes into a different substance.
a)
Physical
b)
Chemical
29.

In a chemical reaction, substances are changed in a way that creates new substances. The starting substances are called

a)

Reactants

b)

Products

c)

Atoms

d)

Catalysts

30.

How many Al atoms are in this formula? 4Al2O3

a)

2

b)

8

c)

6

d)

4

31.

_BaS + _PtF2 → _BaF2 + _PtS


which of the following shows this reaction balanced? (5 minutes)

a)

1 BaS + 1 PtF2 → 1 BaF2 + 1 PtS

b)

4 BaS + 2 PtF2 → 1 BaF2 + 1 PtS

c)

1 BaS + 2 PtF2→ 2 BaF2 + 2 PtS

d)

1 BaS + 3 PtF2 →1 BaF2 + 2 PtS

32.

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

a)

the product is doubled

b)

the product is half the mass of the reactants

c)

the mass is the same

d)

the mass changes depending on the reaction

33.

_K + _Cl2 →_KCl


which of the following shows this reaction balanced? (3 minutes)

a)

2 K + 16 Cl2 → 8 KCl

b)

2 K + 1 Cl2 → 2 KCl

c)

3 K + 4 Cl2 → 3 KCl

d)

1 K + 1 Cl2 →1 KCl

34.
The following is what type of reaction:
NH3 + HCl  → NH4Cl
a)
Synthesis
b)
Decomposition
c)
Single Replacement Replacement
d)
Double Replacement Replacement
35.

What happens in a decomposition reaction?

a)

putting substances together

b)

breaking substances apart

c)

element replacing another element in a compoud

d)

burning of a subtance

36.

Substance that changes the rate of a chemical reaction without being consumed in the reaction

a)

bonding

b)

catalyst

c)

chemical reaction

d)

activation energy

37.

A catalyst

a)

is added to a reaction to make it slow down

b)

breaks apart and is changed

c)

raises activation energy

d)

lowers activation energy

38.

What is the activation energy?

a)

The energy of the products

b)

The energy of the reactants

c)

The amount of energy needed to start the reaction

d)

The energy lost in the reaction

39.
In an endothermic reaction the system is releasing energy.
a)
True
b)
False
40.

If an endothermic reaction happens in a beaker, and we touched the beaker, it would feel _______.

a)

Warm

b)

Cold

41.

Taste sour

a)

acid

b)

base

c)

both

42.

Are caustic or corrosive

a)

acids

b)

bases

c)

both

43.

Feels slippery

a)

acids

b)

bases

c)

both

44.

Conducts an electric current

a)

acids

b)

bases

c)

both

45.

Turns blue litmus red

a)

acid

b)

base

c)

both

46.
What is the pH of distilled water?
a)
1
b)
4
c)
7
d)
11
47.
A pH of 14 is a .....
a)
strong acid
b)
weak acid
c)
Strong base
d)
Weak base
48.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
49.
Which of the following elements is required in an organic compound?
a)
nitrogen
b)
oxygen
c)
carbon
d)
sodium
50.
Which of the following formulas is inorganic?
a)
CHO
b)
CH
c)
SiO
d)
CHCOOH
51.
Which polymer group is used as STORED energy?
a)
carbohydrate
b)
lipid
c)
protein
52.

Source of quick energy

a)

carbohydrates

b)

lipids

c)

proteins

d)

nucleic acids

53.
Is this an example of an organic or inorganic compound?
a)
Organic
b)
Inorganic
54.
Is this an example of an organic or inorganic compound?
a)
Organic
b)
Inorganic
55.
Water is what type of compound?
a)
organic
b)
inorganic
c)
toxic
56.
What best describes this image shown?
a)
Inorganic molecule
b)
Organic molecule

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