Unit 2: History and The Atom

Question 1

Coined the phrase “atomos”; Father of Modern Science

Answer 1

Democritus

Question 2

The early version of chemistry

Answer 2

Chymistry

Question 3

Phlogiston Theory

Answer 3

Georg Stahl

Question 4

Father of Modern Chemistry

Answer 4

Antione Lavoisier

Question 5

First to quantitively support the idea of atomos, created the Atomic Theory

Answer 5

John Dalton

Question 6

Created the periodic table

Answer 6

Dimitri Mendeleev

Question 7

Discovered the electron via a cathode ray device; created plum-pudding model

Answer 7

JJ Thomson

Question 8

Discovered the charge of an electron via the oil drop experiment

Answer 8

R. A. Milikan

Question 9

Discovered the proton exists at the center of atoms - the nucleus - via the gold foil experiment

Answer 9

Ernest Rutherford

Question 10

Created the Bohr model

Answer 10

Neils Bohr

Question 11

Electrons create a probability density field around the nucleus; one of the fathers of quantum theory

Answer 11

Schrodinger

Question 12

Discovered the neutron

Answer 12

James Chadwick

Question 13

Atoms that have the same number of protons but different number of neutrons

Answer 13

Isotopes

Question 14

Protons + neutrons

Answer 14

Mass number

Question 15

Average mass of all isotopes for an element

Answer 15

Average atomic mass (amu)

Question 16

C-14

Answer 16

Isotope format 2

Question 17

Lose electrons, positive charge

Answer 17

Cations

Question 18

Gain electrons, negative charge

Answer 18

Anions

Question 19

amu formula

Answer 19

(mass of isotope * relative abundance) + (mass of isotope * relative abundance)

Question 20

Add up the total mass of each element in a compound

Answer 20

Molar mass