Atom, elements, and compounds

Question 1

according to this theory, matter is made up of extremely small and indestructible particles called atoms

Answer 1

Dalton’s Atomic Theory

Question 2

3 men who composed atomic theory

Answer 2

Democritus, Aristotle, Dalton

Question 3

Joseph Louis Proust Theory

Answer 3

Law of definite proportion, law of multiple proportions, and law of conservation of mass

Question 4

same elements are given the same mass proportions

Answer 4

law of definite proportion

Question 5

2 elements combine and form more than one compound

Answer 5

law of multiple proportions

Question 6

matter and energy can neither be created nor destroyed

Answer 6

law of conservation of mass

Question 7

building blocks which make up substances. smallest unit of an element that can enter into a chemical reaction

Answer 7

atoms

Question 8

atomos

Answer 8

democritus

Question 9

billiard ball model

Answer 9

dalton

Question 10

raisin bread model/electron

Answer 10

thomson

Question 11

gold foil expt/proton in the nucleus

Answer 11

rutherford

Question 12

neutron

Answer 12

james chadwick

Question 13

planetary model

Answer 13

bohr

Question 14

quantum mechanic model/3d model

Answer 14

schrodinger

Question 15

greek word for atom meaning indivisible

Answer 15

atomos

Question 16

electron is how many times lighter than proton

Answer 16

1836

Question 17

same number of protons (same element) but diff number of neutrons

Answer 17

isotope

Question 18

same number of neutrons

Answer 18

isotone

Question 19

same mass number

Answer 19

isobar

Question 20

describes main electron shell and the size of the e-cloud

Answer 20

principal quantum number

Question 21

describes the subshell and the shape of the e-cloud

Answer 21

angular/azimuthal quantum number

Question 22

describes the orbital or orientation in space

Answer 22

magnetic quantum number

Question 23

Rules/Principles in Quantum Numbers

Answer 23

Pauli’s exclusion principle, Aufbau’s principle, Hund’s rule

Question 24

no 2 e can have the same set of quantum numbers

Answer 24

pauli’s exclusion principle

Question 25

building up principle

Answer 25

aufbau's principle

Question 26

electrons are spread singly

Answer 26

hund's rule

Question 27

first to set up the table (33 elements)

Answer 27

Lavoisier

Question 28

Triads. The iron triad comprises iron, cobalt, and nickel

Answer 28

Dobereiner

Question 29

iron triad

Answer 29

iron, nickel, cobalt

Question 30

law of octaves

Answer 30

newland

Question 31

8 elements are grouped before another set of 8 elements

Answer 31

law of octaves

Question 32

1st periodic law, properties are periodic functions of atomic wt

Answer 32

Meyer & Mendeleev

Question 33

first modern periodic table

Answer 33

Moseley

Question 34

how many elements, groups/families, and periods/series in the periodic table

Answer 34

118 elements, 18 groups, 7 periods