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Chem U8 TeamA

Total questions: 34

Worksheet time: 34mins

Name
Class
Date
1.
CN-
a)
cyanide
b)
carbon nitride
2.

OH–

a)

hydrogen carbonate

b)

oxonium

c)

hydroxide

d)

acetate

3.

PO43–

a)

phosphorus tetroxide

b)

phosphate

c)

sulphate

d)

hydroxide

4.

Ammonium

a)

NH3+

b)

NH3

c)

CN+

d)

NH4+

5.

CO32-

a)
bicarbonate
b)
carbonite
c)
carbonate
d)
chlorite
6.

All atoms are most stable with (or would "prefer") how many electrons in their valence shell?

a)

1

b)

2

c)

8

d)

18

7.

How many valence electrons does carbon have?

a)

4

b)

5

c)

6

d)

7

8.

This could be the dot diagram of

a)

Mg

b)

Cl

c)

C

d)

O

9.

This is a correct dot diagram for oxygen (O)

a)

true

b)

false

10.

Na ionizes to a charge of _______

a)

+1

b)

+2

c)

-1

d)

-2

11.

Mg ionizes to a charge of ______.

a)

+1

b)

+2

c)

-1

d)

-2

12.

F ionizes to a charge of ________.

a)

-2

b)

-1

c)

+1

d)

+2

13.

Ca ionizes to a charge of _______.

a)

+1

b)

+2

c)

-1

d)

-2

14.

What is a cation's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element

15.

What would the correct charge of magnesium (Mg) when it forms a cation?

a)

Mg+

b)

Mg2+

c)

Mg3+

d)

Mg8+

16.

What would the correct charge of potassium (K) when it forms a cation?

a)

K1+

b)

K2+

c)

K3+

d)

K4+

17.

What is the empirical formula for N2S3?

a)

NS

b)

N3S2

c)

N2S3

d)

N1S1.5

18.
Which one is an empirical formula?
a)
H2O2
b)
C2H6O12
c)
CaCl2
d)
N2O8
19.
A formula with the lowest whole # ratio of elements in a compound is called
a)
Molecular Formula
b)
Chemical Formula
c)
Empirical Formula 
d)
Distance Formula
20.

Which one is the empirical formula?

C4H6

a)

CH

b)

CH3

c)

C2H3

d)

C4H6

21.

Which one is the empirical formula?

P2O6

a)

P2O6

b)

PO

c)

PO3

d)

P3O

22.
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
23.
Where are the nonmetals located on the periodic table? 
a)
Blue
b)
Red
c)
Green
24.
Where are metals located on the periodic table?
a)
Blue
b)
Green
c)
Red
25.

How many Aluminum atoms are in Al2O3?

a)

3

b)

5

c)

2

d)

1

26.
An electron has what kind of charge?
a)
no charge
b)
positive 
c)
negative
d)
it depends
27.

NH3

a)

Ionic Bond

b)

Covalent Bond

28.

Share electrons

a)

Ionic Bonds

b)

Covalent Bonds

29.

Gain (take) or lose electrons

a)

Ionic Bonds

b)

Covalent Bonds

30.

Identify the following compound as ionic or covalent: Na2SO4

a)

ionic

b)

covalent

31.

Identify the following compound as metallic, ionic or covalent: SO2

a)

ionic

b)

covalent

c)

metallic

32.

Cobalt (II) chloride, CoCl2

a)

Ionic

b)

Covalent

c)

Metallic

33.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products.  Use the following BALANCED chemical equation to determine the ratio: 2HgO → 2Hg + O22HgO\ \rightarrow\ 2Hg\ +\ O_2    What is the ratio of HgO to Hg

a)

2:2

b)

1:3

c)

2:1

d)

1:2

34.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products. 

Use the following BALANCED chemical equation to determine the ratio:
4NH3+6NO → 5N2+6H2O4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O   
What is the ratio of  NH3NH_3   to  N2N_2  

a)

4:5

b)

1:1

c)

2:3

d)

5:6

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