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QUIZ-CHEM

Total questions: 70

Worksheet time: 35mins

Name
Class
Date
1.

What is a positive ion called?

a)

anion

b)

cation

c)

isotope

d)

covalent

2.

What is a negative ion called?

a)

anion

b)

cation

c)

covalent

d)

isotope

3.

If an atom gains electrons, the charge will be positive.

a)

true

b)

false

4.

If an atom loses electrons, it becomes a negative ion.

a)

True

b)

False

5.

Which particles change the charge in atoms when ions are formed?

a)

Protons

b)

Electrons

c)

Neutrons

6.

Cations are...

a)

Positive

b)

Negative

c)

Neutral

7.

An atom becomes _________ when it gains electrons.

a)

Positive

b)

Negative

c)

Neutral

8.

An atom becomes _______ when it loses electrons.

a)

Positive

b)

Negative

c)

Neutral

9.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
10.

Which of the following elements will form a cation?

a)

Arsenic

b)

Copper

c)

Bromine

d)

Fluorine

11.

Which of the following will form an anion?

a)

Titanium

b)

Iron

c)

Calcium

d)

Sulfur

12.

Which of the following will form a cation?

a)

Aluminum

b)

Sulfur

c)

Iodine

d)

Nitrogen

13.

Which of the following will form an anion?

a)

Tin

b)

Lead

c)

Chlorine

d)

Zinc

14.

Which of the following elements will form an anion?

a)

Calcium

b)

Cobalt

c)

Nickel

d)

Iodine

15.

Which of the following will form a cation?

a)

Tellurium

b)

Iodine

c)

Nitrogen

d)

Nickel

16.

Which of the following will form an anion?

a)

Oxygen

b)

Cobalt

c)

Strontium

d)

Cesium

17.

How are ionic bonding, covalent bonding, octet rule, and electronegativity all related? Select all the choices that apply.

a)

They all relate to ions being formed.

b)

They all relate to valence electrons.

c)

They all relate to electrons being shared.

d)

They all relate to the stability of the atom.

18.

What is the main difference between cations and anions? Select ALL that apply.

a)

the direction that electrons are moving.

b)

electrons move out of the atom in a cation.

c)

electrons move into the atom with an anion.

d)

How to get electrons to be shared between atoms.

19.

Select the choice that is not correctly paired up.

a)

8 valence electrons = Neon

b)

2 valence electrons = Sulfur

c)

3 Valence electrons = Boron

d)

4 Valence electrons = Carbon

20.

Name the following: Li2OLi_2O  

a)

Dilithium monoxide

b)

Lithium oxygen

c)

Lithium oxide

d)

Lithium (II) oxide

21.

Select the choice that is written correctly.

a)

Magnesium gains valence electrons

b)

Lithium loses valence electrons

c)

Neon gains valence electrons

d)

Fluorine loses valence electrons

22.

How do you know if the chemical bond is nonpolar covalent?

a)

The difference between the atoms electronegativity is greater than 1.7

b)

The difference between the atoms electronegativity is between 1.7 and 0.4

c)

The difference between the atoms electronegativity is between 0 and 0.4

23.

How do you know if the chemical bond is ionic?

a)

The difference between the atoms electronegativity is greater than 1.7

b)

The difference between the atoms electronegativity is between 1.7 and 0.4

c)

The difference between the atoms electronegativity is between 0 and 0.4

24.

Select ALL of the chemical formulas that are written correctly.

a)

Ca3N2Ca_3N_2  

b)

LiOLiO  

c)

BeF2BeF_2  

25.

Select ALL of the choices that are correctly paired.

a)

Calcium Fluoride = CaF2CaF_2  

b)

Aluminum Oxygen = Al2O3Al_2O_3  

c)

Sodium Sulfide = Na2SNa_2S  

26.

Which of the the following is positively charged and located in the nucleus?

a)

protons

b)

neutrons

c)

electrons

d)

quarks

27.

Number of moles of sugar in 547.2 gram are:


(Mol. mass of sugar = 342)

a)

1.6

b)

2.2

c)

342

d)

548

28.

The mass of 100 molecules of sucrose (C12H22O11) is_________.

a)

100 g

b)

342 g

c)

3.88 × 10–20 g

d)

5.68 × 10–20 g

29.

A solution is 25% water, 25% ethanol and 50% acetic acid by mass. The mole fraction of water is:

a)

0.6

b)

0.856

c)

0.99

d)

0.502

30.

250 mL of 1.5 M solution of sulphuric acid is diluted by adding 5L of water. The molarity of the diluted solution is:

a)

0.0926

b)

0.0823

c)

0.0714

d)

12

31.
What is the mass of 2.50 mol of oxygen gas O2?
a)
40 g
b)
80 g
c)
16 g
d)
32 g
32.

How many Mg atoms are present in 3.00 moles of MgCl2 ?

a)

1.81 x 10^24

b)

3.02 x 10^24

c)

12.0 x 10^25

d)

16.0 x 10^23

33.

What is the mass percent of carbon in carbon dioxide?

a)

40

b)

27

c)

32

d)

10

34.

An atom of carbon has 6 protons and 7 neutrons in its nucleus. If the atom is neutral, how many electrons does it have?

a)

0

b)

7

c)

6

d)

13

35.

The electrons in the outermost energy level are called

a)

valence

b)

ions

c)

covalent

d)

farthest out

36.

The image shows the periodic grid for SODIUM. What is Sodium's atomic mass?

a)

11

b)

12

c)

23

d)

Impossible to tell

37.

What element will have the most similar physical and chemical properties to the element Sulfur (S)?

(click on the periodic table to expand it!)

a)

Carbon (C)

b)

Phosphorous (P)

c)

Oxygen (O)

d)

Neon (Ne

38.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
39.

What will be the molarity of a solution, which contains 5.85 g of NaCl(s) per

500 mL?

a)

4

b)

20

c)

0.2

d)

2

40.

The number of atoms present in one mole of an element is equal to Avogadro

number. Which of the following element contains the greatest number of

atoms?

a)

4g He

b)

46g Na

c)

0.4g Ca

d)

12g He

41.

Calculate the molecular mass of acetone (CH3COCH3 )

a)

46 g mol-1

b)

64 g mol-1

c)

58 g mol-1

d)

100 g mol-1

42.

What is the atomic number?

a)

the number of protons in the nucleus

b)

the number of protons and neutrons in the nucleus

c)

the number of neutrons in the nucleus

d)

the number of protons in the energy levels

43.

What is the atomic number of this atom?

a)

1

b)

3

c)

4

d)

7

44.
What does the C represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
45.

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

a)

20

b)

10

c)

35

d)

25

46.

What does the 6 represent?

a)

Atomic mass

b)

atomic number

c)

chemical symbol

d)

element name

47.

How many protons does indium have?

a)

49

b)

66

c)

114

d)

115

48.

Which scientist was the first to develop the idea of atomic theory?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

49.

A jug contains 2 L of milk. The volume of milk in m3 is:

a)

0.02

b)

2

c)

0.002

d)

0.0002

50.

The molality of a solution containing 20.7 g of potassium carbonate dissolved in 500 mL of solution:


(assume density of solution =1 g mL–1).

a)

3.13 m

b)

0.313 m

c)

31.3 m

d)

None of the above

51.

2.46 g of sodium hydroxide (molar mass = 40) is dissolved in water and the solution is made to 100 cm3 in a volumetric flask. The molarity of the solution is:

a)

3.14 M

b)

0.04 M

c)

0.615 M

d)

4.2 M

52.

The concentration of sugar (C12H22O11) in mol L–1 if its 20 g are dissolved in enough water to make a volume up to 2 L is:

a)

0.029

b)

0.92

c)

0.356

d)

0.859

53.

A solution is 25% water, 25% ethanol and 50% acetic acid by mass. The mole fraction of water is:

a)

0.6

b)

0.856

c)

0.99

d)

0.502

54.

250 mL of 1.5 M solution of sulphuric acid is diluted by adding 5L of water. The molarity of the diluted solution is:

a)

0.0926

b)

0.0823

c)

0.0714

d)

12

55.

How many moles are 98.3 grams of aluminum hydroxide, Al(OH)3? (Atomic mass of Al = 27, H= 1, O = 16)

a)

1.26 moles

b)

0.8 moles

c)

7,673.4 moles

d)

150 moles

56.
How many moles are in 3.01 x 1022 atoms of magnesium?
a)
0.0500 moles
b)
1.81 x 1046 moles
c)
5.00 x 1021 moles
d)
5.00 moles
57.
How many gram is 0.5 mol of Copper atoms? (Cu:63,5g/mol)
a)
63,5 g
b)
6,35 g
c)
31,75 g
d)
3,175 g
58.
What is the mass of 2.50 mol of oxygen gas O2?
a)
40 g
b)
80 g
c)
16 g
d)
32 g
59.

The number of moles of iodine in a sample containing 1.0 × 1022 molecules are:

a)

6.022 X 1023 Moles

b)

0.0166 Moles

c)

3 moles

d)

None of the above

60.

Na2SO3.xH2O has 50% H2ONa_2SO_3.xH_2O\ has\ 50\%\ H_2O  by mass. Hence x is

a)

4

b)

5

c)

6

d)

7

61.

A mixture with more solute dissolved in the solvent than is usually soluble is called:

a)

concentrated

b)

supersaturated

c)

saturated

d)

unsaturated

62.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
63.

Solubility refers to the ____ of solute that can dissolve in a certain volume or mass of solvent, at a certain temperature.

a)

Mean

b)

Range

c)

Amount

d)

Mode

64.

What is the molarity of a 0.5L sample of a solution that contains 60.0 g of sodium hydroxide (NaOH)

a)

0.8 M

b)

1.5M

c)

3.0M

d)

6.0M

65.
What does it mean to dilute a solution?
a)
lower the concentration of solute per solvent
b)
increase the concentration of solute per solvent
66.

Which of the following is the correct formula for calculating molarity?

a)

moles/liters of solution

b)

moles/kg of solvent

c)

# particles/Avogadro's #

d)

theoretical yield/actual yield

67.

What is the concentration of a solution that has 3.0 moles of solute dissolved in 1.5 L of solution?

a)

0.50 M

b)

1.5 M

c)

2.0 M

d)

3.0 M

68.

How many grams of NaCl (MM=58.44 g/mol) are dissolved in 1.0 L of a 0.5 M solution?

a)

about 29 grams

b)

about 58 grams

c)

about 116 grams

d)

about 232 grams

69.

What is the concentration of the solution when 11 grams of CaCl2 (MM = 110.98 g/mol) is dissolved in 1.0 L of solution?

a)

0.10 M

b)

1.0 M

c)

11 M

d)

111 M

70.

A solution has a volume of 350 mL. What is the volume of the solution in liters?

a)

35 L

b)

3.5 L

c)

0.35 L

d)

0.035 L

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