S2 Chemistry Module 1

_____ are the smallest particles of matter.

How many elements are there on the Periodic Table?

• 117

• 118

• 120

• 100

Elements are made up of only one ​ type of ​ (a)   . They are ​ (b)   substances.

• atom
• molecule
• pure
• impure

Elements after number 92 have been made by scientists. Sort the elements into natural and man-made.

Groups:

(a) Natural

,

(b) Man-made

• Oxygen

• Hydrogen

• Iron

• Curium

• Sodium

• Plutonium

• Einsteinium

• Nobelium

Which two elements are liquid at room temperature?

Rows in the Periodic Table are called ​ (a)  

• periods
• groups

Columns in the Periodic Table are called ​ (a)  

• groups
• periods

Where are the alkali metals?

Where are the transition metals?

Where are the halogens?