C1-atomic structure

Question 1

who published their ideas about atoms in 1803?

Answer 1

John dalton

Question 2

who discovered the electron?

Answer 2

JJ thompson

Question 3

who created the plum pudding model?

Answer 3

JJ thompson

Question 4

what was the logic behind the plum pudding model?

Answer 4

the atom is a ball of positive charge with negative electrons embedded in it - like currants in a Christmas pudding.

Question 5

who performed the alpha particles gold foil experiment?

Answer 5

Ernest Rutherford

Question 6

what did Rutherfords experiment show?

Answer 6

• the mass of an atom is concentrated at the centre, the nucleus
• the nucleus is positively charged

Question 7

who created the bohr model?

Answer 7

Niels Bohr

Question 8

what did the bohr model show?

Answer 8

electrons orbit the nucleus on fixed electron shells

Question 9

who discovered the neutron?

Answer 9

James chadwick

Question 10

what are the three subatomic particles?

Answer 10

electrons, protons, neutrons

Question 11

what is the relative charge for an electron?

Answer 11

-1

Question 12

what is the relative charge for a neutron?

Answer 12

0

Question 13

what is the relative charge for a proton?

Answer 13

+1

Question 14

what determines the atomic number of an element?

Answer 14

amount of protons/electrons

Question 15

how do you calculate the amount of neutrons?

Answer 15

mass number-atomic number

Question 16

what is an isotope?

Answer 16

atoms with same protons and electrons but different number of neutrons