Page 139 - Knowledge Organiser Yr9 24-25

Knowledge Base: Science C1: Atomic Structure and the Periodic Table Year 9
10. Ions and Metals and Non-Metals
10.1
What is an ion?
A charged atom resulting from the loss or gain of electrons.
10.2
If an atom gains electrons, what charge will it have?
Negative.
10.3
If an atom loses electrons, what charge will it have?
Positive.
10.4
What is the definition of a metal?
Elements that react to form positive ions.
10.5
What is the definition of a nonmetal?
Elements that do not form positive ions.
10.6
Are most of the elements on the periodic table metals or non-metals?
Metals.
10.7
Where are metals found on the periodic table?
To the left and bottom of the table.
10.8
Where are non-metals found on the periodic table?
To the right and top of the table.
Knowledge Builder: Predicting properties
What does this graph show us about the melting and boiling points of halogens?
The melting and boiling points increase going down the group, which affects their state
at room temperature.
Which halogen is most likely to be a gas at room temperature?
Fluorine because of its low melting and boiling points
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