Science Test

Question 1

Every subatomic particle has 1amu of mass except one has 0

Answer 1

electron

Question 2

Democriitus

Answer 2

Father of modern atomic though said matter made of small particles called atoms

Question 3

Dalton

Answer 3

created atomiv theory which said atoms are tiny particles atoms of different elements are different atoms of one element are sameatoms combine to form compounds

Question 4

Jj thompson

Answer 4

discovered electrons plum pudding

Question 5

Bohr

Answer 5

Electrons electron shells

Question 6

Rutherford

Answer 6

gold foil experiment discovered atoms are mostly empty space and have a dense center called nucleus

Question 7

Chadwick

Answer 7

discovered the neutron

Question 8

Isotopes

Answer 8

atoms of an element have same number of protons different neutrons

Question 9

Atomic mass

Answer 9

average weight based on abundance

Question 10

Mendeelev

Answer 10

created peiodic table based on on atomic mass number of protons and neutrons Mostly changed peoridoc table to be arranged by atomic number

Question 11

Ions

Answer 11

atoms that contain a uneven number of protons and electorns which result in postive or negative charge

Question 12

Atomic number

Answer 12

tells us how many protons and electrons

Question 13

neutrons

Answer 13

subtract number of protons from atomic mass