Chapter 5

Question 1

How many electrons shells does sodium (Na-ll) posses?

Answer 1

3

Question 2

In attempting to group elements, Mendeleev used their…

Answer 2

physical and chemical properties

Question 3

Mendeleev’s periodic table arranged all the known elements in order of…

Answer 3

increasing atomic mass

Question 4

When Mendeleev arranged the elements in rows of seven…

Answer 4

all elements in a column had the same valence

Question 5

The elements of the modern periodic table are arranged in order of increasing…

Answer 5

atomic number

Question 6

The modern periodic law states that the physical and chemical properties of elements are periodic functions of their…

Answer 6

atomic number

Question 7

Elements in the same family of the periodic table…

Answer 7

have similar properties

Question 8

The most abundant element in the atmosphere is…

Answer 8

nitrogen

Question 9

Elements on the left side of the periodic table tend to be…

Answer 9

active solids

Question 10

Elements on the far, right side of the periodic table tend to be…

Answer 10

inactive gases

Question 11

The most abundant element in the earth’s crust is…

Answer 11

oxygen

Question 12

Most of the elements on the periodic table are…

Answer 12

metals

Question 13

Which of the following is a metalloid?

Answer 13

silicon (14)

Question 14

Moving left to right across a period, the number of valence electrons of the atoms…

Answer 14

increases steadily

Question 15

In chemical combinations, nonmetals tend to…

Answer 15

gain electrons

Question 16

Which of the following occurs in a regular, repeating pattern in Mendeleev’s table?

Answer 16

chemical properties

Question 17

Which chemical group includes elements that are found in nature as solids, liquids, and gases?

Answer 17

halogens

Question 18

The noble gases are inactive because…

Answer 18

their outermostenergy levels are complete

Question 19

Which is true for all the members of the halogen family?

Answer 19

they have 7 valence electrons

Question 20

The category that includes potassium(K-19)…

Answer 20

alkali metals

Question 21

The category that includes calcium(Ca-20)…

Answer 21

alkaline earth metals

Question 22

The category that includes iron(Fe-26)…

Answer 22

transition metals

Question 23

How many valence electrons does boron (B-5) posses?

Answer 23

3

Question 24

T/F: The properties of the elements in a period are very similar…

Answer 24

false

Question 25

T/F: Metalloids are better conductors of heat and electricity than are metals

Answer 25

false

Question 26

T/F: The alkali metals are more active than the alkaline earth metals

Answer 26

true

Question 27

T/F: No two elements have the same atomic number

Answer 27

true

Question 28

T/F: Most of the elements of the periodic table exist naturally as solids

Answer 28

true

Question 29

The standard on which the atomic mass unit is bases is the mass of a...

Answer 29

carbon-12 atom

Question 30

At room temperature, none of the metals are...

Answer 30

gases

Question 31

In the modern periodic table, elements are arranged by increasing...

Answer 31

atomic number

Question 32

Properties of elements in a predictable way when atomic numbers are used to arrange elements into...

Answer 32

groups

Question 33

Pattern of repeating pattern is...

Answer 33

periodic law

Question 34

Each column on periodic table is a...

Answer 34

group

Question 35

Each row on the periodic table is a...

Answer 35

period

Question 36

_________________ is a value that depends on the distribution of an element's isotopes in nature and the masses of those isotopes

Answer 36

atomic mass

Question 37

______is defined as one twelfth the mass of a carbon-12 atom

Answer 37

atomic mass number

Question 38

___________ are classified as metals, nonmetals, and metalloids

Answer 38

elements

Question 39

_______are elements that form a bridge between the elements on the left and right sides of the table

Answer 39

transition metals

Question 40

________are metals with properties that fall between metals and nonmetals

Answer 40

metalloids

Question 41

Group 2A is called....

Answer 41

alkaline earth metals

Question 42

Group 3A is called....

Answer 42

the boron family

Question 43

Group 4A is called....

Answer 43

the carbon family

Question 44

Group 5A is called....

Answer 44

the nitrogen family

Question 45

Group 7A is called....

Answer 45

halogens

Question 46

Group 8A is called....

Answer 46

noble gases

Question 47

_____is an electron that is the highest occupied energy level of an atom.

Answer 47

valence electron

Question 48

Elements in a group have similar properties because they have the same number of __________

Answer 48

valence electrons

Question 49

Group 1A are called....

Answer 49

alkali metal