Topic 1-Lecture 1

Question 1

Contains particles, or units, of more than one specific atom or molecule

Answer 1

Mixture

Question 2

Different pure samples of the same compound always contain the same proportions of each element by mass

Answer 2

Law of Definite Proportions

Joseph Proust

Question 3

Attracted to positive magnetic field

Answer 3

Bata particles

-

Question 4

Attracted to negative magnetic field

Answer 4

Alpha particle

+

Question 5

Neutral particle

Answer 5

Gama

Question 6

Deflection in an atom is caused by the stream hitting the ____________.

Answer 6

Nucleus
~gold foil
~Earnest Rutherford

Question 7

The nucleus contains…

Answer 7

Protons and neutrons

Question 8

Equal to the number of protons plus the number of neutrons

Answer 8

Mass Number

Question 9

The number of protons or electrons (in a neutral atom)

Answer 9

Atomic number

Question 10

Mass number- atomic number=

Answer 10

Number of neutrons

Question 11

An element with varying numbers of neutrons

Answer 11

Isotope

~exhibit identical chemical behavior

Question 12

Average of all isotopes of an element

Answer 12

Average Atomic Mass

Question 13

Stripping an atom of its electrons to gain a charge

Answer 13

Ionization

Question 14

Atoms from a pure sample are ionized and accelerated through a magnetic field

Answer 14

Mass Spectrometry
~isotopes with smaller gasses experience a greater degree of deflection
~more massive=greater % abundance

Question 15

(Mass # X % Abundance) + (Mass # X % Abundance)

Answer 15

Average Atomic Mass

Question 16

Basic unit in a network solid

Answer 16

Formula Weight

Question 17

Molecules that can exist independently

Answer 17

Molecular weight

Question 18

Contains particles, or units, of one specific atom or molecule

Answer 18

Pure sample

Question 19

Percentage of mass of an element in a substance

Answer 19

Mass percent=

(#of atoms of element)(elements atomic mass)
——————————————————X100
Formula weight of compound

Question 20

Small whole # ratio can be created by comparing any two elements

Answer 20

Law of Multiple Proportions
John Dalton

Heavier mass (compound)
------------------------------
Lighter mass (compound)

Question 21

Wrote the Law of Conservation of Mass

Answer 21

Antoine Lavoisier

Question 22

Developed first atomic theory

Answer 22

Democritus

Question 23

Wrote the Law of Definite Proportions

Answer 23

Joseph Proust

Question 24

Wrote four postulates and Law of Multiple Proportions

Answer 24

John Dalton

Question 25

Discovered electrons in cathode ray tube experiment

Answer 25

JJ Thompson

Question 26

Discovered nucleus in gold foil experiment

Answer 26

Earnest Rutherford