Chemistry 2 (Crash Course)

Question 1

How is the periodic table of elements organized?

Answer 1

Ordered by atomic number, electron configuration, and reoccurring chemical properties

Question 2

What represents all the isotopes together to varying degrees?

Answer 2

Atomic mass number

Question 3

Describe some features of the periodic table

Answer 3

-Used to derive properties of elements -May predict properties of undiscovered elements -Framework used for analyzing chemical behavior

Question 4

Define nucleons

Answer 4

protons+neutrons, which are contained in the nucleus of an atom and make up 99.9% of an atom’s mass

Question 5

What is the charge of an atom based on?

Answer 5

The number of protons

Question 6

How do isotopes differ?

Answer 6

Isotopes contain the same number of protons but different number of neutrons. If you change the number of protons, you essentially have a completely different element

Question 7

When looking at the periodic table, what equates to the number of protons in which an element contains?

Answer 7

The atomic number represents the number of protons

Question 8

When looking at the periodic table, what equates to the number of protons in which an element contains?

Answer 8

You would have to subtract the # of protons from the atomic mass number to calculate the number of neutrons

Question 9

Describe the number of mols found in Carbon

Answer 9

There are 12.01 grams of Carbon per mol

Question 10

What is 1 mol equivalent to?

Answer 10

6.022 x 10^23

Question 11

Describe the octet rule

Answer 11

Atoms exist in their most stable form when their valence shell is full; so atoms strive to have 8 electrons in valence shell (except for Hydrogen and Helium)

Question 12

Which group of elements are most stable because their valence shell is full?

Answer 12

Noble gases (aka Inert gases)

Question 13

What is a redox reaction?

Answer 13

It is a coupled reaction (reduction + oxidation).

Question 14

What does the Roman numeral for transitional metals communicate?

Answer 14

The charge on the metal, and NOT the number of atoms

Question 15

What is the charge on OH?

Answer 15

OH^-

Question 16

Define binary acids

Answer 16

Acids composed of Hydrogen + Nonmetal

Question 17

What is the relationship between the radius of the nonmetal and acid acidity in binary acids?

Answer 17

larger radius = longer, weaker bond, resulting in a lower pH and more acidic acid

Question 18

Define oxyacids

Answer 18

Acids composed of Hydrogen + Oxygen + at least one other atom, usually a nonmetal

Question 19

What is the difference between a molecule and a compound?

Answer 19

A molecule is composed of two or more of the same atom. A compound is composed of two or more of the same atom or different atoms. All compounds are molecules, but not all molecules are compounds.

Question 20

What is the charge on C₂H₃O₂ (acetate)?

Answer 20

C₂H₃O₂^-

Question 21

What is the charge on NO₃ (nitrate)?

Answer 21

NO₃^-

Question 22

What is the charge on PO₄ (phosphate)?

Answer 22

PO₄^3-

Question 23

What is the charge on SO₄ (sulfate)?

Answer 23

SO₄^2-

Question 24

What is the charge on CO₃ (carbonate)?

Answer 24

CO₃^2-

Question 25

What is the charge on CN (cyanide)?

Answer 25

CN^-

Question 26

What is the charge on ClO₃ (chlorate)?

Answer 26

ClO₃^-