Quiz On Scientists

Question 1

Democritus

Answer 1

Developed All matter is made up of atoms.
Stated atoms are so small that they can’t be divided.
Multiple atom types and world made up of empty space and atoms.

Question 2

Dalton

Answer 2

States all matter is made of indivisible and indestructible atoms.
In chemistry reaction , atoms are rearranged or form compounds.
Atoms combine in whole numbers

Question 3

Thomson

Answer 3

Discovered that atoms consist of a large sphere of positivity charge, with electrons.
Both negative and positive charges in an atom
Plum pudding model

Question 4

Plum pudding

Answer 4

Protons and electrons within sphere

Question 5

Bothe/Chadwick

Answer 5

Bombarded beryllium atoms with alpha particles

Mass of an atom is a neutron and existence of them.

Question 6

Rutherford

Answer 6

Change model shape
Gold foil experiment
Most of atom is empty space with dense positive charged nucleus

Question 7

Gold foil experiment

Answer 7

Alpha particles shot at gold foil and some went through and some repelled.

Question 8

Rutherford and Bohr

Answer 8

Planetary model

With orbital path within pos and negs

Question 9

Atomic number

Answer 9

Number of protons of each atom in that element.

Defines the element (# of protons)

Question 10

Isotopes

Answer 10

Atoms of the same element that have different masses.

Same number of protons and electrons

Question 11

Mass number

Answer 11

Total number of protons and neutrons that made up the nucleus of an isotope

Question 12

Atomic mass

Answer 12

Mass of protons plus electrons

Units of atomic mass on grams

Question 13

Protons and what else are the same

Answer 13

Neutrons