Ch 2 Problems

Question 1

Most of the mass of an atom is in the nucleus.

True or False

Answer 1

True

Question 2

Electrons determine the size of an atom.

True or false

Answer 2

True

Question 3

All isotopes of an element have the same number of protons.

True or false

Answer 3

True

Question 4

Most elements have more than one isotope on earth.

True or false

Answer 4

True

Question 5

Every of every isotope of Mo weighs 95.95 u.

True or False

Answer 5

False

Question 6

Most elements are metals.

True or false

Answer 6

True

Question 7

Uranium is an inner transition element.

True or false

Answer 7

True

Question 8

Selenium is a metal element.

True or false

Answer 8

False

Question 9

Bromine is a halogen.

T or F

Answer 9

T

Question 10

Calcium is an alkali metal

T or F

Answer 10

F

Question 11

Tin is in the fifth period.

T or F

Answer 11

T

Question 12

Neon is a noble gas.

T or F

Answer 12

T

Question 13

Aluminum is a main group metal element.

T or F

Answer 13

T

Question 14

Zinc is a transition metal element.

T or F

Answer 14

T

Question 15

All halogens exist as a monatomic as their normal elemental form.
T or F

Answer 15

F

Question 16

O2 and O3 are allotropes of Oxygen.

T or F

Answer 16

T

Question 17

Every molecule is identified by a specific number of atoms in a specific arrangement.
T or F

Answer 17

T

Question 18

Graphite is one allotrope of carbon.

T or F

Answer 18

T

Question 19

In it typical elemental form, hydrogen is monatomic.

T or F

Answer 19

F

Question 20

Neutrons in ^196Hg?

Answer 20

116

Question 21

Protons in ^40Ca?

Answer 21

20

Question 22

Electrons in ^69Ga?

Answer 22

31

Question 23

Neutrons in ^32S?

Answer 23

16

Question 24

Protons in ^14C?

Answer 24

6

Question 25

Electrons in ^40K?

Answer 25

19

Question 26

Halogen in the forth period?

Answer 26

Br

Question 27

Noble gas in period 3?

Answer 27

Ar

Question 28

Main group metal with smallest atomic number?

Answer 28

Li

Question 29

Period for silver?

Answer 29

5

Question 30

Group is barium?

Answer 30

2

Question 31

Alkali metal in fifth period?

Answer 31

Rb

Question 32

Least reactive element?

Answer 32

He

Question 33

Most reactive element?

Answer 33

F (F2)

Question 34

What is the symbol for atomic number?

Answer 34

Z

Question 35

Symbol for mass number?

Answer 35

A

Question 36

How do you find the mass number?

Answer 36

Sum of number of protons and neutrons

Question 37

Symbol for atomic mass unit?

Answer 37

u

Question 38

What are the 18 vertical columns in the periodic table called?

Answer 38

Groups

Question 39

What are the horizontal rows called?

Answer 39

Periods

Question 40

What are the 6 metalloids?

Answer 40

Boron, silicon, germanium, arsenic, antimony, tellurium

Question 41

Remember PoBiSnAl

Answer 41

Metals on right of table

Question 42

Group 1

Answer 42

Alkali metals

Question 43

Group 2

Answer 43

Alkaline earth metals

Question 44

Group 3-12

Answer 44

Transition metals

Question 45

Group 15

Answer 45

Pnictogens

Question 46

Group 16

Answer 46

Chalcogens

Question 47

Group 17

Answer 47

Halogens

Question 48

Group 18

Answer 48

Noble gases

Question 49

What does inert mean?

Answer 49

Chemical dudness

Question 50

What is monatomic?

Answer 50

One atom, mother atoms join it

Question 51

What is polyatomic?

Answer 51

Two or more atoms joined together

Question 52

What elements are monatomic?

Answer 52

Noble gases

Question 53

What is a molecule?

Answer 53

NEUTRAL assembly of two or more atoms bonded together

Question 54

What are the three parts to a molecules identity?

Answer 54

Specific number- how many
Specific atoms- which elements
Specific arrangement- shape

Question 55

What group is diatomic?

Answer 55

Group 17

Question 56

What is n allotrope?

Answer 56

Different elemental forms of the same element.

Ex. O2 and O3