atomic structure

Question 1

which atomic model was the first to introduce a nucleus

Answer 1

rutherford

Question 2

true or false

the experimental work of james chadwick provided evidence to show the existence of neutrons in the nucleus

Answer 2

true

Question 3

true or false

atoms of the same element have the same number of protons

Answer 3

true

Question 4

how many times smaller is a nucleus than an atom

Answer 4

10 000

Question 5

describe a description of an atom

Answer 5

a positively charged nucleus surrounded by negative electrons

Question 6

what is the best description of alpha radiation

Answer 6

helium nucleus

Question 7

what is the best description of beta radiation

Answer 7

high speed electron

Question 8

an atom described as radioactive is…

Answer 8

highly likely to decay and emit radiation

Question 9

‘count-rate’ is the number of decays recorded by a detector per second.
true or false

Answer 9

true

Question 10

which radiation has the longest range in air?

Answer 10

gamma

Question 11

which radiation is the most ionising?

Answer 11

alpha