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Midterm Review

Total questions: 46

Worksheet time: 31mins

Name
Class
Date
1.

Which of the following is a pure substance that contains 2 or more elements chemically combined

a)

heterogeneous mixture

b)

homogeneous mixture

c)

compound

2.

Which of the following is a heterogeneous mixture?

a)

mixture where you can see the different components - not uniform

b)

mixture where you can’t see the different components - uniform throughout

3.

Which of the following correctly defines accuracy?

a)

measure of how close you are to the actual value

b)

measure of how close numbers are to each other - need more than 1 number to compare

4.

Element, Compound, Heterogeneous Mixture or Homogeneous mixture? Table Salt, NaCl

a)

Element

b)

Compound

c)

HE mixture

d)

HO mixture

5.

Element, Compound, Heterogeneous Mixture or Homogeneous mixture? Magnesium

a)

Element

b)

Compound

c)

HE mixture

d)

HO mixture

6.

Element, Compound, Heterogeneous Mixture or Homogeneous mixture? iced tea without ice

a)

Element

b)

Compound

c)

HE mixture

d)

HO mixture

7.

Element, Compound, Heterogeneous Mixture or Homogeneous mixture? Combination of Salt and Pepper

a)

Element

b)

Compound

c)

HE mixture

d)

HO mixture

8.

Chemistry is the study of ___________ and the changes it undergoes

a)

biology

b)

matter

c)

living things

d)

solids

e)

elements

9.

Density =

a)

mass * volume

b)

mass / volume

10.

Which state of matter has indefinite shape and volume?

a)

solid

b)

liquid

c)

gas

11.

Which state of matter has definite shape and volume?

a)

solid

b)

liquid

c)

gas

12.

Acid or Base? HCl

a)

acid

b)

base

13.

Acid or Base? LiOH

a)

acid

b)

base

14.

Ionic or Covalent? KClO

a)

ionic

b)

covalent

15.

Ionic or Covalent? Li2SO4

a)

ionic

b)

covalent

16.

Ionic or Covalent? H2O

a)

ionic

b)

covalent

17.

Ionic or Covalent? NO

a)

ionic

b)

covalent

18.

How many significant figures does the following number contain? 490

a)

1

b)

2

c)

3

19.

How many significant figures does the following number contain? 1,000.

a)

1

b)

2

c)

3

d)

4

20.

How many significant figures does the following number contain? 0.0051

a)

2

b)

3

c)

4

d)

5

21.

How many significant figures does the following number contain? 0.150

a)

2

b)

3

c)

4

22.

Which are found in the nucleus? CHECK ALL THAT APPLY

a)

protons

b)

neutrons

c)

electrons

23.

Which is ALWAYS equal to the atomic number?

a)

protons

b)

neutrons

c)

electrons

d)

protons and electrons

24.

How many protons does Potassium (K) have?

a)

20

b)

19

c)

39

25.

Na+1 has how many protons and electrons?

a)

11 protons and 10 electrons

b)

10 protons and 11 electrons

c)

11 protons and 11 electrons

d)

none of the above

26.

How many neutrons does neutral sodium (Na) contain?

a)

10

b)

11

c)

12

d)

23

27.

Who discovered the electron using the cathode ray tube experiment and formed the plum pudding model?

a)

Rutherford

b)

Thomson

c)

Dalton

d)

Goldstein

28.

Who discovered the nucleus using the gold foil experiment?

a)

Rutherford

b)

Thomson

c)

Dalton

d)

Chadwick

29.

Which points are true of Dalton's atomic theory. CHECK ALL THAT APPLY

a)

all matter is made up of tiny particles called atoms

b)

all atoms of same element are the same; all atoms of different elements are different

c)

compounds are formed when atoms combine in small whole numbers

30.

The p sublevel can hold up to ___ electrons

a)

2

b)

6

c)

8

d)

12

31.

The s sublevel can hold up to ___ electrons

a)

2

b)

4

c)

6

d)

8

32.

If two atoms have the same electron configuration they are said to be ___________________

a)

periodically matching

b)

isoelectronic

c)

accurate

d)

obey the periodic law

33.

The first periodic table was arranged by

a)

Mendeleev

b)

Rutherford

c)

Chadwick

d)

Goldstein

e)

Moseley

34.

A vertical column on the periodic table is called a

a)

period

b)

group

35.

Which group is nonreactive?

a)

group 17, halogens

b)

group 18, noble gases

c)

transition metals

d)

alkali metals

36.

In covalent bonding elements ___________ electrons

a)

share

b)

transfer

37.

In ionic bonding, electrons are ________________

a)

shared

b)

transferred

38.

Which type of bonding can conduct electricity in water?

a)

ionic

b)

covalent

39.

Which type of bonding forms crystalline structures and have high melting points?

a)

ionic

b)

covalent

40.

Atoms ________ 2 electrons to get a +2 charge

a)

gain

b)

lose

41.

What type of bond does O2 make?

a)

single

b)

double

c)

triple

42.

What shape does CH2S make?

a)

trigonal pyramidal

b)

trigonal planar

c)

linear

d)

bent

e)

none of above

43.

What shape does H2S make?

a)

linear

b)

trigonal planar

c)

trigonal pyramidal

d)

bent

44.

Which type of bonding involves both metals and nonmetals?

a)

ionic

b)

covalent

45.

Name the following compound: CaF2

a)

calcium fluoride

b)

calcium difluoride

c)

none of above

46.

Name the following compound: S2O4

a)

sulfur oxide

b)

sulfur tetroxide

c)

disulfur trioxide

d)

disulfur tetroxide

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