CHEM FINAL

Question 0

One cm^3=

Answer 0

1 mL

Question 1

Density of water

Answer 1

1g/mL

Question 2

Extensive

Answer 2

Change with the amount of the substance

Question 3

Intensive

Answer 3

Never changes

Question 4

Dalton

Answer 4

Father of atomic theory:

-all matter is made of small indivisible particles called atoms

Question 5

Law of conservation

Answer 5

Matter is not lost nor destroyed in a chemical reaction

Question 6

Law of definite proportions

Answer 6

Atoms combine in small whole-number ratios to for, a compound

Question 7

Law of multiple proportions-

Answer 7

atoms can combine in different ratios to form different proportions

Question 8

Thompson

Answer 8

Discovered the electron using the cathode ray tube

Question 9

Rutherford

Answer 9

Discovered the nucleus using gold foil and alpha ray experiment

Question 10

Bohrs

Answer 10

Made model where electrons orbit the nucleus in specific energy levels ( only hydrogen)

Question 11

Isotope

Answer 11

Different number of neutrons

Question 12

Periodic table

Answer 12

Mendeleev- first to create the periodic table
Moseley updated and arranged according to atomic numbers
| = groups
- = periods

Question 13

Periodic trends

Answer 13

Influenced by the effective nuclear charge
Electro negativity increases to top right corner
Atomic radius goes to bottom left corner
Ionization increases to top right corner

Question 14

Aufbau’s principle

Answer 14

Electrons will occupy the lowers energy position possible

Question 15

Pauli exclusion principle

Answer 15

Electrons that occupy the same orbital will have opposite signs

Question 16

Hund’s rule

Answer 16

Orbitals with the same energy will fill with single electrons be gore any will accept a second electron

Question 17

Non-polar covalent

Answer 17

<-.3

Question 18

Polar covalent

Question 19

Ionic

Answer 19

1.7 ->

Question 20

Intermolecular forces ( strongest to weakest )

Answer 20

Hydrogen bonds
Dipole-dipole
London forces

Question 21

Empirical

Answer 21

Simplified

Question 22

Molecular

Answer 22

Natural

Question 23

Unstable isotopes have a …..

Answer 23

Half life

Question 24

Fusion

Answer 24

-><-

Question 25

Fission

Question 26

Exothermic

Answer 26

Release energy -^H

The energy of the products is less than the energy of the reactants

Question 27

Endothermic

Answer 27

Absorb energy +^H

The energy of the products is more than the energy of the reactants

Question 28

.1 calories=

Answer 28

4.18 J