C3 1 The Periodic Table

Titanium is not very dense or reactive, but is expensive. It can therefore be used to make:

Copper is used to make wires because it has what properties?

If a halogen is more reactive than another halogen that's in a compound, what will happen?

Which is the most reactive Halogen?

How many electrons in the outer shell of halogens, and what charge do their ions have?

Copper belongs to what section of the periodic table?

What gas is released when the alkali metals are added to water?

Who left gaps in the early periodic table so that undiscovered elements coulc be added?

Why are the Noble gases so unreactive?

What does the group number tell us?

How many electrons in the outer shell of alkali metals, and what charge do their ions have?

Which is the most reactive Alkali Metal?

How do we test for this gas?

If a halogen is less reactive than another halogen that's in a compound, what will happen?

What does the period number tell us?