Figures In Atomic Theory

Question 1

what is an atom

Answer 1

the smallest particle. mostly empty space

Question 2

democritis

Answer 2

says the world is made up of tiny indivisible particles called ‘atomos’

Question 3

ancient times

Answer 3

main focus was on alchemy, developed new processes like filtration, chrystallization, and distillation

Question 4

alchemy

Answer 4

in search of elixir of life, tried to mix mercury and sulfur to make gold to make immortality

Question 5

1300s

Answer 5

black plague, medicinal chemistry, halts need for gold/greed, survival is new priority

Question 6

lavoisier

Answer 6

*law of conservation of matter - total mass of the products of a chemical reaction is the same as the total mass of reactants, wife works with him in the lab

Question 7

Joseph Proust

Answer 7

*Law of Definite Proportions - elemental composition of a pure substance is always the same, son of apothecary, a compound always containd element in the same proportions by mass

Question 8

John Dalton

Answer 8

poor quaker, collects samples and compares masses of the compounds

Question 9

atomic theory

Answer 9

1. each element is composed of extremely small particles called atoms, 2. all toms of a given element are identical, but they differ from those of any other element

Question 10

Law of Conservation of matter

Answer 10

atoms are neither created nor destroyed in any chemical reaction

Question 11

Law of Definite Proportion

Answer 11

A given compound always has the same relative numbers + kinds of atoms

Question 12

Robert Miliken

Answer 12

did the oil drop experiment

Question 13

Ernest Rutherford

Answer 13

discovered massivee positive core is nucleus

Question 14

Mosely

Answer 14

unique positive charge in nucleus of different elements, atoms can be identified by the number of protons they have

Question 15

james chadwick

Answer 15

discovets nuetron

Question 16

Faraday

Answer 16

discovers atoma contain particles that carry an electrical charge