Chemistry Emma

What did Mendeleev arrange the elements in order of?

• the alphabet

• increasing relative atomic mass

• decreasing relative atomic mass

• random order

How did he then group the elements?

• alphabetical order

• his favourites

• similar properties

• in size

What did he leave gaps for?

• so he could invent new elements

• he couldn't remember them

• yet to be discovered elements

• he couldn't be bothered to do anymore

How many different elements are there in the periodic table?

Elements are arranged into rows called ​ (a)   in order of increasing atomic number and vertical columns called ​ (b)   where the elements have similar properties.

• periods
• groups
• sets
• segments
• axis

Metal elements are found on the ____ hand side

• right

• left

Non-metal elements are found on the ____ hand side

• right

• left

Most of the elements on the Periodic table are ​ (a)  

Iron, ​ (b)   and gold are examples of metal elements. Metals have properties in common. They are:

● ​ (c)   , especially when they are freshly cut

● good ​ (d)   of heat and electricity

● ​ (e)   (they can be bent and shaped without breaking)

• metals
• magnesium
• shiny
• conductors
• malleable
• dull
• rigid
• insulators
• rubber

Most metals also have other properties in common. They are:

● ​ (a)   at room temperature, except mercury

● hard and ​ (b)  

● they have a ​ (c)   density

• solid
• strong
• high
• low
• soft
• liquid

Name a metal that is magnetic