Atomic Structure

Question 1

Who invented the plum pudding model?

Answer 1

Ernest Rutherford

Question 2

Who discovered the neutron?

Answer 2

James Chadwick

Question 3

What is the mass of an electron?

Answer 3

1/1840

Question 4

What is the mass of both a proton and a neutron?

Answer 4

1

Question 5

What is the charge of a proton?

Answer 5

-1

Question 6

What is the charge of a neutron?

Answer 6

0

Question 7

What is the charge of an electron?

Answer 7

-1

Question 8

Where are electrons found?

Answer 8

In shells orbiting the nucleus

Question 9

Where are protons and neutrons found?

Answer 9

The nucleus

Question 10

What is the atomic number?

Answer 10

The number of protons in the nucleus of an atom

Question 11

What is the mass number?

Answer 11

The total number of protons and neutrons in the nucleus of an atom

Question 12

Why does an atom have no electrical charge?

Answer 12

The total +1 charges of the protons cancel out the total -1 charges of the electrons

Question 13

How many electrons are found in the first shell of an atom?

Answer 13

2

Question 14

How many electrons are found in the second shell of an atom?

Answer 14

8

Question 15

What are isotopes?

Answer 15

Atoms (of the same element) that hove the same atomic number but different mass number/ same number of protons different number of neutrons

Question 16

The masses of all atoms are measured relative to which atom?

Answer 16

Carbon 12

Question 17

What is an element?

Answer 17

A substance that consist of only one type of atom and it cannot be broken down into anything simpler by chemical means

Question 18

If an ion has a charge of 2+, what needs to happen to it to become stable?

Answer 18

Lose 2 electrons

Question 19

What is the relative atomic mass?

Answer 19

The mass of an atom compared with that of the carbon 12 isotope.