chem

Question 1

. Matter can neither be destroyed nor created

Answer 1

Law of Conservation of Mass

Question 2

He discovered the protons using thin foil of gold and alpha particles

Answer 2

. Rutherford

Question 3

. Atoms with the same number of protons but different number of neutrons

Answer 3

Isotopes

Question 4

He was a Greek philosopher who proposed that matter is Made up of indivisible particles called “atomos”

Answer 4

Democritus

Question 5

. He discovered Neutron

Answer 5

James Chadwick

Question 5

Hydrogen that has 1 proton and 1 neutron

Answer 5

Deuterium

Question 5

Positively charge ion

Answer 5

Cation

Question 6

All elements in a compound have a proportion of those Definite Composition chemical compound that can be expressed in small whole
number ratio

Answer 6

Law of Multiple Proportion

Question 7

He proposed the atomic theory

Answer 7

Dalton

Question 8

Positvely charged particle

Answer 8

. Protons

Question 9

An atom that has the same number of protons but different. Number of neutron

Answer 9

Isotopes

Question 10

. Subatomic paticles that has no charge.

Answer 10

. Neutron

Question 11

. Negatively charged particle

Answer 11

Electron

Question 11

. All samples in a chemical compound contail all elements in The same proportion

Answer 11

Law of Definite Composition

Question 12

. He discovered Neutron

Answer 12

. James Chadwick