Atomic Structure and the Period Table pt.2

What are alkali metal properties

They are shiny until reacting to air which makes them dull

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They are soft and become softer going down the period

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Their melting points decrease going down the period

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They have low densities

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The reactivity increases going down the period

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The electron on the outer shell has the weakest attraction to the nucleus

What are transition metal properties

Strong, malleable, sonorous

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They have high melting and boiling points

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They are good thermal and electrical conductors

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They are solid at room temperature (except mercury)

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They have high densities

What is a catalyst?

A substance that accelerates the rate of a chemical reaction

What are halogen properties?

They have low melting and boiling points from their weak intermolecular force

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They all exist as diatomic molecules

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They go through covalent bonds to have a full outer shell

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A more reactive halogen can displace a less reactive halogen from its salt dissolved in water

What are the noble gases properties?

Their reactivity decreases going down the period

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They have a full outer shell so are nonreactive but stable

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The atoms of each noble gas become larger going down the period

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There are less forces of attraction between the outer shell and nucleus as the shells in between act as shields