Assessment 1 Flashcards
What is matter?
Matter is made up of atoms arranged in different ways e.g. solids, liquids and gases
How many elements in the Periodic Table?
118 elements
What is an element?
An element is a substance made from one type of atom e.g. a lump of gold is made up of gold atoms only.
Which elements are liquid at room temperature?
Mercury and Bromine
What is a period?
A period is a horizontal row
What is a group?
A group is a vertical column
What are the groups called?
Group 1 - alkali metals
between 2 and 3 - transition metals
Group 7 - the halogens
Group 8 - the noble gases
How do you write a chemical symbol?
If it has one letter only it should be a capital
If it has 2 letters only the first is a capital e.g. Br
Where can metals be found in the periodic table?
Left hand side
How can metals be identified?
They conduct electricity, are shiny and solid at room temperature [except mecury]
What is formed when elements react and combine?
A compound
How are compounds different from elements?
They have different properties.
What does it mean if a compound ends in -ide?
It contains two elements
What does it mean if a compound ends in -ite or ate?
It contains 3 elements, one of which is oxygen.
Which elements are present in sodium chlorate?
sodium, chlorine and oxygen
