Atomic Structure

Question 1

What is an atom

Answer 1

The smallest piece of an element that can still be recognised as that element

Question 2

What is a molecule

Answer 2

Two or more molecules covalently bonded together. Molecules contain a certain fixed number of atoms

Question 3

What is the relative mass of a proton

Answer 3

1

Question 4

What is the relative mass of a neutron

Answer 4

1

Question 5

What is the relative mass of an electron

Answer 5

1/1836

Question 6

What is the relative charge of a proton

Answer 6

+1

Question 7

What is the relative charge of a neutron

Answer 7

0

Question 8

What is the relative charge of an electron

Answer 8

-1

Question 9

What do atoms consist of

Answer 9

A nucleus containing protons and neutron surrounded by electrons orbiting in shells

Question 10

How many electrons fit on the first shell of an atom

Answer 10

2

Question 11

How many electrons fit in the second and third shells of the atom

Answer 11

8

Question 12

What is the atomic number

Answer 12

-The number of protons
-the number of electrons
-the top number

Question 13

What is the mass number

Answer 13

-the bottom number
-the total number of protons and neutrons in an atom

Question 14

What are isotopes

Answer 14

Atoms of the same element which have different numbers of neutrons but the same amount of electrons and protons and have identical chemical properties

Question 15

What is the relative atomic mass

Answer 15

The weighted average mass of the isotopes of the element

Question 16

How do you calculate the relative atomic mass of an element from isotopic abundances e.g 50% bromine 79 and 50% bromine 81

Answer 16

(50x79)+(50x81)/100=80