the nuclear model

Question 1

what did Niels Bohr propose?

Answer 1

electrons orbit the nucleus at specific distances (energy levels or shells)

Question 2

why was Bohr’s idea accepted?

Answer 2

it was proved by the results of experiments by other scientists

Question 3

what was the positive charge in the nucleus caused by?

Answer 3

protons

Question 4

what does the protons determine?

Answer 4

amount of positive charge in nucleus

Question 5

what did James Chadwick discover?

Answer 5

nucleus contains neutral particles called neutrons

Question 6

what is the radius of an atom?

Answer 6

0.1 nanometres
1 x10 to the -10 m

Question 7

what is the radius of the nucleus?

Answer 7

1 x 10 -14m

Question 8

relative charge and mass of protons

Answer 8

+1 1

Question 9

relative charge and mass of electrons

Answer 9

1 very small

Question 10

relative charge and mass of neutrons

Answer 10

0 1

Question 11

what charge do atoms have

Answer 11

no overrall charge due to number of electrons and protons are the same so positive and negative charges cancel each other