IGCSE Atomic Structure

Question 1

To find the number of neutrons in an atom...

Accepted Answer

Mass number - atomic number

Question 2

Different isotopes of a particular element have...

Accepted Answer

same atomic number, different mass number

Question 3

Atoms of which element have electronic configuration 2,8,3?

Accepted Answer

Aluminium

Question 4

The number of outer shell electrons equals the...

Accepted Answer

Group number

Question 5

The atomic number of an element always tells you...

Accepted Answer

The number of protons

Question 6

Different isotopes of a particular element have...

Accepted Answer

same no. of protons, different no. of neutrons

Question 7

The element in group 4 and period 5 is...

Accepted Answer

tin

Question 8

What is the electronic configuration of an atom of neon?

Accepted Answer

2,8

Question 9

50% of bromine atoms have mass 79 and 50% have mass 81. What is its relative atomic mass?

Accepted Answer

80

Question 10

The number of shells with electrons in equals the...

Accepted Answer

Period number

Question 11

Which is the correct maximum number of electrons for each of the first three shells?

Accepted Answer

2, 8, 8

Question 12

Calcium is in...

Accepted Answer

Group 2 and period 4

Question 13

Which is of these is found in the nucleus of an atom?

Accepted Answer

Neutrons

Question 14

Cl exists as two isotopes: Cl-35 and Cl-37. Which is not a possible Relative Formula Mass for a Cl2 molecule?

Accepted Answer

71

Question 15

The oxides of sulphur and phosphorus are...

Accepted Answer

Acidic

Question 16

How many neutrons are found in the nucleus of an atom of phosphorus?

Accepted Answer

16

Questions 16