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Unit 2 Review Atoms, Ions, and Molecules Enriched

Total questions: 49

Worksheet time: 34mins

Name
Class
Date
1.

Classify the matter in the image

a)

element

b)

compound

c)

mixture of 2 elements

d)

mixture of element and compound

e)

mixture of 2 compounds

2.

Classify the matter in the image

a)

element

b)

compound

c)

mixture of 2 elements

d)

mixture of element and compound

e)

mixture of 2 compounds

3.

Classify the matter in the image

a)

element

b)

compound

c)

mixture of 2 elements

d)

mixture of element and compound

e)

mixture of 2 compounds

4.

Classify the matter in the image

a)

element

b)

compound

c)

mixture of 2 elements

d)

mixture of element and compound

e)

mixture of 2 compounds

5.

Classify the matter in the image

a)

element

b)

compound

c)

mixture of 2 elements

d)

mixture of element and compound

e)

mixture of 2 compounds

6.

Classify the matter in the image

a)

element

b)

compound

c)

mixture of 2 elements

d)

mixture of element and compound

e)

mixture of 2 compounds

7.

Which of these is not one of the 7 diatomic elements?

a)

hydrogen

b)

carbon

c)

nitrogen

d)

oxygen

8.

What is the difference between a homogeneous mixture and a heterogeneous mixture?

a)

how well they are mixed (homogeneous is evenly mixed)

b)

heterogeneous is a mixture of at least 2 different things

c)

homogeneous tends to be opaque (cloudy)

d)

a homogeneous mixture is a pure substance

9.

Classify this matter: copper

a)

element

b)

compound

c)

homogeneous mixture

d)

heterogeneous mixture

10.

Classify this matter: CuSO4CuSO_4  

a)

element

b)

compound

c)

homogeneous mixture

d)

heterogeneous mixture

11.

Classify this matter: a dog

a)

element

b)

compound

c)

homogeneous mixture

d)

heterogeneous mixture

12.

Classify this matter: clean air

a)

element

b)

compound

c)

homogeneous mixture

d)

heterogeneous mixture

13.

Which part of Dalton's atomic theory is not true based on what we know today?

1.All Matter is composed of extremely small particles called atoms. 

2. All atoms of a given element are identical, having the same size, mass and chemical properties.  The atoms of one element are different from the atoms of all other elements.

3.Chemical reactions only involve the rearrangement of atoms.

4.When elements react, their atoms combine in simple, whole-number ratios.

a)

1

b)

2

c)

3

d)

4

14.

According to Dalton’s atomic theory, atoms

a)

are destroyed in chemical reactions.

b)

can be divided.

c)

of each element are identical in size, mass, and other properties.

15.

According to this idea, matter cannot be created or destroyed, only rearranged. The image on the left shows this as the reaction to the left of the arrow has 4 red atoms, 1 black atom, and 4 white atoms. The right side, after the reaction, has the same number of atoms. Nothing was lost or gained.

a)

law of definite proportions (aka law of multiple proportions)

b)

law of indivisible atom

c)

law of conservation of mass (aka law of conservation of matter)

d)

law of nuclear retention

16.

According to this idea, all samples of a given chemical compound have the same elemental composition by mass. For example, in carbon monoxide there are 12 g of carbon to 16 g oxygen in that same ratio.

a)

law of definite proportions (aka law of multiple proportions)

b)

law of indivisible atom

c)

law of conservation of mass (aka law of conservation of matter)

d)

law of nuclear retention

17.

H2OH_2O   is the formula for water (2 hydrogen atoms for every 1 oxygen atom) and H2O2H_2O_2   is hydrogen peroxide (2 hydrogen atoms for every 2 oxygen atoms). These are very different chemicals and this displays

a)

the law of conservation of mass (aka law of conservation of matter)

b)

law of definite proportions (aka law of multiple proportions)

c)

law of gravity

d)

law of combined mass

18.

In JJ Thomson's experiment, shown in the image, what was the device called?

a)

anode ray tube

b)

cathode ray tube

c)

gold foil experiment

d)

plum pudding

19.

Which path shows the correct path of the cathode rays?

a)

A (the rays were attracted to the negative and repelled by the positive)

b)

B (the rays were not attracted to negative or positive)

c)

C (the rays were attracted to the positive and repelled by the negative)

d)

none of these

20.

Based on the Thomsons's experiment, the cathode ray was actually determined to be made of __________indicating that there existed particles smaller than the atom.

a)

nucleus

b)

alpha particle

c)

electron

d)

neutron

e)

proton

21.

In Rutherford's gold foil experiment, most of the alpha particles _____________ and this indicated______________.

a)

bounced back, the atom was evenly spread mass

b)

went straight through,

the atom was mostly empty space

c)

bounced back, the atom was was evenly spread mass

d)

went straight through, was evenly spread mass

22.

Rutherford determined in his gold foil experiment that the atom's mass is

a)

concentrated in a dense, positively-charged nucleus

b)

spread throughout the entire atom in a large positive mass

c)

concentrated in a dense, negatively-charged nucleus

d)

spread throughout the atom in a large negative mass

23.

This subatomic particle has the least mass by far

a)

electrons

b)

protons

c)

neutrons

d)

alpha particles

24.

Mass Number and Atomic Mass are very different. Which of these describes mass number? (more than one correct answer)

a)

whole number

b)

the entire element's mass

c)

protons + neutrons of a single isotope

d)

a count of all particles in the nucleus

e)

a decimal

25.

Mass Number and Atomic Mass are very different. Which of these describes atomic mass? (more than one correct answer)

a)

whole number

b)

the entire element's mass

c)

protons + neutrons of a single isotope

d)

found on the periodic table

e)

a decimal

26.

True or False: Mass number can be found by rounding the mass on the periodic table

a)

true

b)

false

27.

True or False: The Mass number can only be determined if it is already given in the problem OR if the neutron number and proton number are in some way given

a)

true

b)

false

28.

In the left image, what is the mass number?

a)

235

b)

92

c)

143

d)

238

29.

In the left image, what is the electron number?

a)

235

b)

92

c)

143

d)

238

30.

In the left image, what is the proton number?

a)

235

b)

92

c)

143

d)

238

31.

These are two isotopes of uranium. Select the difference between them

a)

neutron number

b)

proton number

c)

mass

d)

chemical properties

32.

How many electrons does this aluminum ion have?

a)

13

b)

16

c)

10

d)

27

33.

How many electrons does this iodine ion have?

a)

53

b)

52

c)

54

d)

127

34.

What is the proper name for this formula? MnO2MnO_2  

a)

manganese oxide

b)

manganese dioxide

c)

manganese (IV) oxide

d)

manganese (II) oxide

35.

What is the proper name for this formula? CF4CF_4  

a)

carbon fluoride

b)

carbon tetrafluoride

c)

carbon (IV) fluoride

d)

carbon quadfluoride

36.

What is the proper name for this formula? MgSO4MgSO_4  

a)

magnesium (II) sulfate

b)

magnesium sulfate

c)

magnesium sulfide

d)

magnesium sulfite

37.

What is the proper name for this formula? Li3NLi_3N  

a)

lithium nitride

b)

lithium nitrite

c)

lithium (I) nitride

d)

lithium (III) nitride

38.

Which of these are the acids you are supposed to know?

a)

HClHCl  (hydrochloric acid)

b)

HBrHBr  (hydrobromic acid)

c)

HIHI  (hydroiodic acid)

d)

H2SO4H_2SO_4  (sulfuric acid)

e)

HNO3HNO_3  (nitric acid)

39.

What is the proper formula for aluminum sulfate?

a)

AlSO4AlSO_4  

b)

Al2(SO4)3Al_2\left(SO_4\right)_3  

c)

Al2S3Al_2S_3  

d)

AlSAlS  

40.

What is the proper formula for calcium nitride?

a)

Ca(NO3)2Ca\left(NO_3\right)_2  

b)

Ca3N2Ca_3N_2  

c)

Ca2N3Ca_2N_3  

d)

CaNO3CaNO_3  

41.

What is the proper formula for lead (IV) phosphide?

a)

Pb3P4Pb_3P_4  

b)

Pb3(PO4)2Pb_3\left(PO_4\right)_2  

c)

PbNPbN  

d)

Pb(PO3)4Pb\left(PO_3\right)_4  

42.

NaCl is a(n) __________compound. The formula is given as the lowest possible ratio of these alternating particles shown in the image, which are known as ______________

a)

ionic, cations and anions

b)

molecular, molecules

c)

ionic, molecules

d)

molecular, cations and anions

43.

Dihydrogen monoxide is a(n) __________ compound and is therefore made up of entire ___________

a)

ionic, ions

b)

molecular, molecule

c)

ionic, molecules

d)

molecular, oins

44.

Did you go and practice the average atomic mass problems? Can you do every type?

a)

yes

b)

no

45.

What is the formula for hydrochloric acid?

a)

HCl

b)

HClO

c)

HClO3

d)

HClO4

46.

What is the correct formula for hydrobromic acid?

a)

HBr

b)

HBrO

c)

HBrO2

d)

HBrO3

47.

What is the formula for hydroiodic acid?

a)

HI

b)

HIO

c)

HIO2

d)

HIO3

48.

What is the formula for nitric acid?

a)

HNO2

b)

HNO3

c)

H2SO3

d)

H2SO4

49.

What is the formula for sulfuric acid?

a)

HNO2

b)

HNO3

c)

H2SO3

d)

H2SO4

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