Deck 3: Elements and Compounds

Question 1

The smallest particle of an element that can exist is called a(n)

A)atom.
B)ferrule.
C)neutron.
D)electron.

Answer 1

atom.

Question 2

The smallest particle of an element that can enter into a chemical reaction is a(n)

A)atom.
B)neutron.
C)ferrule.
D)electron.

Answer 2

atom.

Question 3

All matter is composed of elements.Approximately how many elements are there?

A)4
B)10
C)68
D)100

Answer 3

100

Question 4

Which type of element has the following general properties: low melting point and density, lacks luster,poor conductor of heat and electricity,and brittle?

A)metal
B)nonmetal
C)metalloid
D)transition element

Question 5

Which element is not reactive?

A)Hydrogen
B)Oxygen
C)Iron
D)Helium

Question 6

Most elements are rare.How many elements make up approximately 99% of the mass of theearth's crust,oceans,and atmosphere?

A)2
B)4
C)7
D)10

Question 7

The elements on the periodic table are placed in order of increasing

A)density.
B)atomic number.
C)boiling point.
D)atomic mass.

Question 8

Which is a nonmetal?

A)S
B)Pb
C)Sb
D)Na

Question 9

At room temperature the majority of metals exist as

A)vapors.
B)solids.
C)gases.
D)liquids.

Question 10

On the periodic table vertical columns contain elements with similar properties.These vertical columns are called

A)periods.
B)rows.
C)groups.
D)series.

Question 11

The alkali metals are in group

A)1A
B)3A
C)5A
D)7A

Question 12

The most abundant element in the earth's crust,oceans,and atmosphere is

A)water.
B)hydrogen.
C)iron.
D)oxygen.

Question 13

The halogens are in group

A)1A
B)2A
C)3A
D)7A

Question 14

Which symbol represents a metallic element?

A)P
B)Ti
C)Si
D)I

Question 15

The majority of the elements are

A)metals.
B)gases.
C)nonmetals.
D)metalloids.

Question 16

The alkaline earth metals are in group

A)1A
B)2A
C)5A
D)7A

Question 17

Which is a metalloid?

A)Li
B)Be
C)B
D)C

Question 18

Which element is a liquid at room temperature?

A)fluorine.
B)chlorine.
C)bromine.
D)iodine.

Question 19

Which element is a liquid at room temperature?

A)water.
B)mercury.
C)nickel.
D)iodine.

Question 20

Which type of element has the following general properties: solid at room temperature,high luster,good conductor of heat and electricity,malleable and ductile?

A)metalloid
B)noble gas
C)nonmetal
D)metal

Question 21

Which is a characteristic of all nonmetals?

A)Always gases
B)Poor conductors of heat
C)Shiny in appearance
D)Combine only with metals

Question 22

If an element is a metal,one would expect it to be

A)ductile.
B)dull in appearance.
C)brittle.
D)a nonconductor of electricity.

Question 23

How many atoms of oxygen are indicated in the formula Fe(NO₃)₂?

A)2
B)3
C)5
D)6

Question 24

The charge of a cation is

A)positive.
B)negative.
C)neutral.

Question 25

The charge of an anion is

A)positive.
B)negative.
C)neutral.

Question 26

Which is a compound?

A)Air
B)Lead
C)Water
D)Iron

Question 27

The number of nonmetallic atoms in Al₂(SO₃)₃ is

A)5
B)7
C)12
D)14

Question 28

Which represents an element?

A)CO
B)NI
C)N₂
D)OS

Question 29

A distinct substance composed of two or more elements combined chemically in a definite proportion by mass is a

A)homogeneous mixture.
B)heterogeneous mixture.
C)solution.
D)compound.

Question 30

Co is the symbol for

A)Copper
B)Carbon
C)Cobalt
D)Carbon monoxide

Question 31

Which would you classify as a semiconductor?

A)Diamond
B)Silicon
C)Lead
D)Copper

Question 32

How many different elements are present in the compound FeSO₄?

A)1
B)2
C)3
D)4

Question 33

How many different elements are present in the compound CoCl₂?

A)1
B)2
C)3
D)4

Question 34

What is the total number of hydrogen atoms present in the compound CH₃COOH?

A)1
B)2
C)3
D)4

Question 35

What is the total number of atoms present in Fe₂(SO₄)₃?

A)3
B)10
C)14
D)17

Question 36

How many atoms of hydrogen are present in one molecule of Al(H₂PO₄)₃?

A)2
B)3
C)5
D)6

Question 37

How many atoms of sodium are indicated in the formula Na₂SO₄?

A)1
B)2
C)3
D)4

Question 38

What is the total number of atoms present in one molecule of CH₃COOH?

A)3
B)5
C)8
D)10

Question 39

Which element forms diatomic molecules?

A)Nitrogen
B)Nickel
C)Boron
D)Iron

Question 40

Which element forms diatomic molecules?

A)Sulfur
B)Neon
C)Calcium
D)Chlorine

Question 41

Which of the following formulas contains the fewest oxygen atoms?

A)Ba(ClO₃)₂
B)K₂Cr₂O₇
C)Na₂CO₃
D)Ca(MnO₄)₂

Question 42

The smallest uncharged individual unit of a compound is a(n)

A)atom.
B)molecule.
C)anion.
D)cation.

Question 43

How many atoms of calcium are indicated in the formula Ca(NO₃)₂?

A)1
B)2
C)3
D)9

Question 44

Which is a molecule of phosphorous?

A)F
B)F₂
C)P₄
D)Ph

Question 45

Which element is malleable,ductile,and a good conductor of electricity?

A)S
B)B
C)Au
D)C

Question 46

The nitrate group is NO₃^-1.How many nitrate groups are in the formula NaNO₃?

A)1
B)2
C)3
D)4

Question 47

The ultimate particle of water is a(n)

A)atom.
B)molecule.
C)anion.
D)cation.

Question 48

Which element is not a gas at normal temperature and pressure?

A)Xenon
B)Chlorine
C)Carbon
D)Neon

Question 49

Which is the correct symbol for iron?

A)I
B)I₂
C)FE
D)Fe

Question 50

The symbol for one crystalline form of sulfur is S₈.This symbol indicates

A)one molecule composed of eight atoms.
B)eight molecules.
C)one atom composed of eight molecules.
D)one ion containing eight electrical charges.

Question 51

Which is a cation?

A)He
B)Na
C)Fe⁺³
D)N^-3

Question 52

The formula C₃H₅(OH)₃ contains

A)6 carbon atoms
B)9 carbon atoms
C)18 hydrogen atoms
D)14 total atoms

Question 53

Which is an anion?

A)Cl^-1
B)H₂
C)Fe
D)Fe⁺²

Question 54

An ionic compound is held together by

A)attractive forces between ions of like charges.
B)attractive forces between ions of different charges.
C)repulsive forces between ions of like charges.
D)repulsive forces between ions of different charges.

Question 55

Which cannot be broken down by chemical or physical means?

A)Element
B)Compound
C)Heterogeneous mixture
D)Homogeneous mixture

Question 56

The sulfate group is SO₄^-2.How many sulfate groups are in the formula Fe₂(SO₄)₃?

A)3
B)4
C)7
D)12

Question 57

Which is not a characteristic of metals?

A)Malleable
B)Good conductor of heat
C)Brittle
D)Good conductor of electricity

Question 58

Which is a metalloid?

A)N
B)Ni
C)Al
D)Si

Question 59

Which is not a diatomic gas?

A)Nitrogen
B)Oxygen
C)Chlorine
D)Bromine

Question 60

Which element is brittle and a poor conductor of electricity?

A)Na
B)Cu
C)S
D)Ag

Question 61

Which element is from a representative group?

A)Mn
B)Co
C)V
D)S

Question 62

Which is not a diatomic gas?

A)F₂
B)N₂
C)I₂
D)Cl₂

Question 63

Which is best classified as a semiconductor?

A)Diamond
B)Silicon
C)Lead
D)Sodium chloride

Question 64

Which is an alkali metal?

A)Calcium
B)Sodium
C)Silicon
D)Fluorine

Question 65

Which is an alkaline earth metal?

A)Hydrogen
B)Magnesium
C)Manganese
D)Iodine

Question 66

What is the symbol of the element that is classified as a metalloid and is in Group IVA and period 3?

A)C
B)Ge
C)Ti
D)Si

Question 67

Which is a noble gas?

A)Oxygen
B)Iron
C)Nitrogen
D)Neon

Question 68

Which is the most abundant element in the universe?

A)Oxygen
B)Hydrogen
C)Water
D)Silicon

Question 69

What is the name of the element with an atomic number of 24?

A)Chromium
B)Carbon
C)Cerium
D)Californium

Question 70

How many hydrogen atoms are in the molecule CH₃OH?

A)1
B)2
C)3
D)4

Question 71

Which element is most similar to Calcium?

A)Silicon
B)Potassium
C)Scandium
D)Strontium

Question 72

What is the symbol of the element that is classified as an alkali metal and is in period 4?

A)Ca
B)K
C)Br
D)Na

Question 73

Which is a transition element?

A)Magnesium
B)Potassium
C)Manganese
D)Silicon

Question 74

Which chemical symbol is properly written?

A)CA
B)Cu
C)CO
D)CL

Question 75

Which element is most similar to bromine?

A)Chlorine
B)Radium
C)Cesium
D)Zinc

Question 76

What is the atomic number of selenium?

A)34
B)16
C)14
D)38

Question 77

Which is a halogen?

A)Chlorine
B)Helium
C)Potassium
D)Calcium

Question 78

Which cannot be broken down chemically or physically into a simpler substance?

A)Sugar
B)Salt
C)Seawater
D)Copper

Question 79

How many hydrogen atoms are in the molecule C₃H₅(OH)₃?

A)3
B)5
C)8
D)15

Question 80

What is the atomic number of potassium?

A)15
B)19
C)46
D)50