Chapter 2

Question 1

In a chemical reaction, matter is neither created nor destroyed. Which law does this refer to?

Question 2

Identify the equipment that Thomson utilized to do his research.

Question 3

The mass number is equal to

Question 4

Determine the number of protons, neutrons, and electrons in the following:
25
X
12

Question 5

What species is represented by the following information?
p+ = 47 n° = 62 e- = 46

Question 6

Which of the following does NOT describe a nonmetal?

Question 7

The atomic mass for cadmium is

Question 8

Silver has an atomic mass of 107.868 amu. The Ag-109 isotope (108.905 amu) is 48.16%. What is the amu of the other isotope?

Question 9

Identify the discovery that Millikan made

Question 10

How many electrons does the Br- ion possess?

Question 11

How many electrons does the N3- ion possess?

Question 12

How many electrons does the P3- ion possess?

Question 13

How many electrons does the Al3+ ion possess?

Question 14

Predict the charge of the most stable ion of sodium

Question 15

Which of the following elements is a halogen?

Question 16

Which of the following elements is a nonmetal?

Question 17

Which of the following elements is an alkaline earth metal?

Question 18

Which of the following elements is a transition metal?

Question 19

Sodium belongs to the ________ group of the periodic table

Question 20

Which of the following elements is a good conductor of heat and electricity?

Question 21

Which one of the following elements is a poor conductor of heat and electricity?

Question 22

All of the following elements are nonmetals EXCEPT

Question 23

Predict the charge of the most stable ion of potassium

Question 24

Which of the following elements is a halogen?

Question 25

Which of the following elements is a nonmetal?

Question 26

Which of the following elements is an alkaline earth metal?

Question 27

Which of the following elements is a transition metal?

Question 28

Sodium belongs to the ________ group of the periodic table

Question 29

Predict the charge of the most stable ion of rubidium

Question 30

Which of the following elements is a halogen?

Question 31

Which of the following elements is a nonmetal?

Question 32

Predict the charge of the most stable ion of sodium

Question 33

Identify the discovery that Thomson made

Question 34

Identify the charges of the protons, neutrons, and electrons

Question 35

An atom of 13C contains ________ protons

Question 36

How many electrons are in each neutral atom of magnesium?

Question 37

Isotopes differ in the number of

Question 38

Identify a cation

Question 39

Identify an anion

Question 40

How many electrons does the Se2- ion possess?

Question 41

Calculate the atomic mass of element “X”, if it has 2 naturally occurring isotopes with the following masses and natural abundances

Question 42

What mass (in mg) does 2.63 moles of nickel have?

Question 43

How many iron atoms are contained in 354 g of iron?

Question 44

Calculate the atomic mass of gallium if gallium has 2 naturally occurring isotopes with the
following masses and natural abundances

Question 45

Semiconductors are

Question 46

Identify the equipment that Millikan utilized to do his research

Question 47

Identify the description of an atom

Question 48

Identify the largest subatomic particle

Question 49

Identify the smallest subatomic particle

Question 50

All samples of a given compound, regardless of their source or how they were prepared, have the same proportions of their constituent elements. Which law does this refer to?

Question 51

When two elements form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers. Which law does this refer to?

Question 52

Which of the following is an example of the law of multiple proportions?