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PS Naming, Half Life, Balancing Unit 8

Total questions: 60

Worksheet time: 5hrs 24mins

Name
Class
Date
1.

PCl5 + ___ H2O → ___ HCl + H3PO4

a)

4, 5

b)

1, 6

c)

3, 8

d)

2,2

2.

__ Al + __ FeO → Al2O2 + __ Fe

a)

1, 1, 2

b)

2,1,2

c)

2, 2, 2

d)

2,4,2

3.
 Mg  +  ___ HCl  →   MgCl2  +   H2
a)
1
b)
2
c)
3
d)
4
4.
Which side of a chemical equation is the reactant side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
5.

Which side of a chemical equation is the product side?

a)
Left (before the yields sign)
b)
Right (after the yields sign)
6.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
7.
Balance this equation.
_SnO2 +_H2-->_Sn +_H2O
a)
1,1,2,1
b)
1,2,1,1
c)
1,2,1,2
d)
1,2,2,1
8.
Balance this equation.
_CF4 + _Br2 -- _CBr4 + _F2
a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
9.
What is the little number after an element in a chemical equation called.
Example: H2
a)
Coefficient 
b)
Subscript
c)
Atom
d)
Equation
10.
Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe
a)
Yes
b)
No
11.
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
a)
2, 6, 3, 2
b)
it is already balanced
c)
4, 12, 3, 4
d)
2, 1, 4, 5
12.
Balance this equation.
_CH4 + _O2 --> _CO2 + _H2O
a)
1,2,1,1
b)
2,1,2,1
c)
1,2,1,2
d)
0,2,0,2
13.
Balance this equation.
_CF4 + _Br2 -- _CBr4 + _F2
a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
14.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
15.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
16.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
17.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
18.

The two sides of a chemical equation are called?

a)

Reactants (left) and Products (right)

b)

Ingredients (left) and Product (right)

c)

Cations and Anions

d)

Reactants (left) and Results (right)

19.

Monatomic ions, consist of a ............... atom

a)

More than two

b)

two

c)

single

20.

What is the chemical formula for hexaboran monosilicide?

a)

BSi

b)

Be6Si

c)

Br6Si

d)

B6Si

21.

What is the chemical formula for dinitrogen tetraphosphide?

a)

NP

b)

N4P2

c)

N2P4

d)

N2P3

22.

What is the name for IF7?

a)

monoidine heptafluoride

b)

iodine heptaflouride

c)

iodine fluoride

d)

iron heptafluoride

23.

What is the correct molecular formula for the compound tetraphosphorus trisulfide?

a)

P3S4

b)

K4S3

c)

P4S3

d)

PS

24.

What is the correct molecular formula for the compound boron trifluoride?

a)

BF3

b)

Br3F

c)

BF

d)

B3F

25.

What is the correct name for the compound, PF5?

a)

potassium fluoride

b)

phosphorus fluoride

c)

monophosphorus pentafluoride

d)

phosphorus pentafluoride

26.

What is the correct molecular formula for the compound, dinitrogen pentoxide?

a)

NO

b)

N2O3

c)

N5O2

d)

N2O5

27.

What is the correct name for the compound, S2F10?

a)

sodium fluoride

b)

disodium decafluoride

c)

sulfur fluoride

d)

disulfur decafluoride

28.
BrO3
a)
bromine oxide
b)
monobromine trioxide
c)
bromine trioxide
d)
bromine (III) oxide
29.
What is the name of Br6F10 ?
a)
Bromium fluoride
b)
Hexabromine fluoride
c)
Bromium decafluoride
d)
none of the above
30.
You have 100 grams of radioactive C-14. The half life of C-14 is 5730 years. 
How many grams are left after 1 half life? 
a)
100 grams
b)
25 grams
c)
2 grams
d)
50 grams
31.
If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.
a)
1.25mg
b)
1.25g
c)
10g
d)
10mg
32.
The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?
a)
100.0g
b)
50.0g
c)
12.5g
d)
8.5g
33.
 Fermium-253 has a half-life of 0.334 seconds. A radioactive sample is considered to be completely decayed after 10 half-lives. How much time will elapse for this sample to be considered gone?
a)
0.334 seconds
b)
3.34 seconds
c)
1.77 seconds
d)
13.4 seconds
34.
If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.
a)
1.25mg
b)
1.25g
c)
10g
d)
10mg
35.
The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?
a)
3.0g
b)
0.25mg
c)
0.3g
d)
0.25g
36.
If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?
a)
1 half-life
b)
2 half-lives
c)
3 half-lives
d)
4 half-lives
37.

The half-life of strontium-90 is 25 years. How much strontium-90 was originally present if 0.25 g is present in a sample after 100 years?

a)

4.0 g

b)

2.0 g

c)

0.13 g

d)

0.25 g

38.

The half-life of Zn-71 is 2.4 minutes. If you had 100. g to start, how many grams would you have left after 7.2 minutes has elapsed?

a)

100. g

b)

50.0 g

c)

12.5 g

d)

8.50 g

39.

Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80.0 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?

a)

0.250 g

b)

2.50 g

c)

25.0 g

d)

80.0 g

40.

Match the following prefixes to the correct number.

a)
1
1.

Mono

b)
2
2.

Di

c)
3
3.

Tri

d)
4
4.

Tetra

e)
5
5.

Penta

41.

Hexa​ (a)   Hepta​ (b)   Octa​ (c)   ​ Nona​ (d)   Deca​ (e)  

Choose from the below words
6
7
8
9
10
3
4
1
2
5
42.
Carbon
a)
Element
b)
Compound
c)
Homogeneous Mixture
d)
Heterogeneous Mixture
43.
What type of mixture is this?
a)
homogenous mixture
b)
chemical
c)
heterogeneous mixture 
d)
solid mix
44.

How many electrons fit on the third orbital or energy level of an atom?

a)

2

b)

18

c)

6

d)

8

45.
What does this graph represent?
a)
Constant speed
b)
Acceleration
c)
Not moving
46.

This is Newton's 3rd law

a)

True

b)

False

47.

68 cm = ___________ mm

a)

0.68

b)

6.8

c)

68

d)

680

48.

Which among the two has more potential energy?

a)

yellow skier

b)

blue skier

c)

none of the two

49.
You do 90 joules of work in 30 seconds. How much power have you generated?
a)
30 watts
b)
3 watts
c)
120 watts
d)
270 watts
50.

A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has she done?

a)

600 J

b)

450 J

c)

900 J

d)

1200 J

51.
What is Half-life?
a)
The amount of time it takes for some of the nuclei in a sample of the isotope to decay
b)
The amount of time it takes for half the electrons in a sample of the isotope to decay
c)
The amount of time it takes for half the nuclei in a sample of the isotope to decay
d)
the amount of time it takes to double the nuclei in a sample of the isotope to decay
52.

Which is the correct Lewis Dot Structure of Carbon?

a)
b)
c)
d)
53.

9 F -1

19

How many electrons do I have?

a)

10

b)

9

c)

13

d)

8

54.

Bonds created by sharing electrons with other atoms. Occurs most often between atoms with nearly full valence shells and similar electronegativities.

a)

Covalent Bonds

b)

Ionic Bonds

c)

Metallic Bonds

55.

Bonds created by transferring (giving and taking) electrons where the total number of negative anions equal the total number of positive cations

a)

Covalent Bonds

b)

Ionic Bonds

c)

Metallic Bonds

56.

A chemical bond of metals in which the atoms freely share their few valence electrons with all other atoms.

a)

Covalent Bonds

b)

Ionic Bonds

c)

Metallic Bonds

57.

Which of the following is NOT an example of covalent bonding?

a)

H2O

b)

NaF

c)

NH3

d)

O2

58.

​ Balance the following equation ​

a)2
b)15
c)12
d)6
e)1
f)3
g)4
h)13
1
2
3
4
1)
2)
3)
4)
59.

Which of the following would be considered an ACID?

CHOOSE THREE

A
B
C
D
E
F
60.

When naming a compound, what must the last part be?

a)

the element with "ide" at the end

b)

the element with the ending "ite"

c)

the name of the element

d)

the element with "ide" at the end, unless its a polyatomic ion

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