Topic 6) Atomic structure

Question 1

what is the relative charge of a proton?

Answer 1

+1

Question 2

what is the relative charge of neutron?

Answer 2

0

Question 3

what is the relative charge of electron?

Answer 3

-1

Question 4

what is the relative mass of a proton?

Answer 4

1

Question 5

what is the relative mass of a neutron?

Answer 5

1

Question 6

what is the relative mass of an electron?

Answer 6

close to 0 (1/2,000)

Question 7

what makes up most of the mas in an electron?

Answer 7

protons and neutrons

Question 8

what defines the element of an atom?

Answer 8

the numbers of protons

Question 9

what is the mass number?

Answer 9

protons + neutrons

Question 10

what happens to the atoms when static charge is created?

Answer 10

atoms collide

Question 11

when did rutherford create the plum pudding model?

Answer 11

1905

Question 12

who created the plum pudding model?

Answer 12

Ernest Rutherford

Question 13

how did Rutherford discover the plum pudding model?

Answer 13

directed a beam of alpha particles at a leaf of thin gold suspended in vacuum

Question 14

why does the gold leaf need to be in a vacuum?

Answer 14

to ensure the alpha particles don’t collide with anything else

Question 15

what did the scientists expect to happen to the leaf of gold?

Answer 15

the alpha particles to pass through the leaf

Question 16

what happened to the leaf of gold when the alpha particles hit collide with it?

Answer 16

-most of the alpha particles did pass straight through the foil
-a very small number of alpha particles came straight back off the foil

Question 17

what did Rutherford discover?

Answer 17

the nuclear atom, a small, positively-charged nucleus surrounded by empty space and then a layer of electrons to form the outside of the atom

Question 18

what are isotopes?

Answer 18

forms of an element that have the same number of protons but different numbers of neutrons

Question 19

what makes isotopes similar to atoms?

Answer 19

isotopes have the same number of protons but a different number of neutrons

Question 20

what happens if an atom loses electron(s)?

Answer 20

it becomes a positively charged ion

Question 21

what happens if an atom gains electron(s)?

Answer 21

it becomes a negatively charged ion

Question 22

when did Niels Bohr revise Rutherford’s model?

Answer 22

1913

Question 23

what did Bohr suggest about an atom?

Answer 23

that the electrons orbited the nucleus in different energy levels or at specific distanced from the nucleus

Question 24

what did Bohr discover about the atom?

Answer 24

that some physical quantities only take discrete values