Alkali and Alkaline Earth Metals (and a Gas)

I have been writing riddles and rhymes.
For school and to pass the time.
Can you guess any of these.
Now try your best, please.
(And the last atomic number is 38,
Now are the answers easy to state?)

Chalk it up to me, its what I do,
whether real or fake, I’m also found in you,
I’m found it milk too, but not in the sky,
there's no bones about it, what am I?

Crystals of me are blue and green,
or as a metal used for rockets to space.
Strong and lightweight but able to charm,
or used to move golf balls from place to place.
What am I?

I’m not related to rubies,
except by names,
pure I’m not red,
but I’m red in flames.
What am I?

3Me can make thinks glow,
and I’m also found in snow,
and also near sun and stars,
but not for long lest your near be far.
What am I?

A ribbon of me can be lit with a match,
but as a bulk metal is kinda hard to catch
fire, but then its a mass casualty,
(certainly no a cup o’ tea)
what am I?

Soft enough to cut with a knife,
pure I can take your life.
However as a type of pill,
I can make your mood still.
I’m used in batteries for electric cars,
because of me they can go far.
What am I?

Bananas are high in me,
and the purple you see,
is a thin coating of oxide,
that’s purple or black ’round my sides.
I make a salt, which is also salt free,
but my salt tastes sort of metaly.
A lack of me will make you freeze,
why then I must be ----- !?!

I’m used in lye and salt,
but in lights there is my fault,
because I make people look dead,
sort of like they were filled with lead.
And in water I’m not tame,
well, what’s my name?

When I react with aluminum I glow very bright.
With titanium I fake diamonds that sparkle in light.
An aluminum alloy mixed with me
becomes stronger when flexed.
Because an isotope of me is radioactive,
 I became bad news by the press.
What am I?