A/N: This is pure chemistry as in science. Abt group 17 of the periodic table. I have an entrance exam tom, posting for fun and good luck bcz why not?😂

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Seventeen in science

One seven in rhyme

Two in orbit one

Seven in the last

one electron it calls

To get a stable cast

A tale of a table

with common table salt

A row filled with elements

electronegative the most

N' the size keeps growing

As we go down the mast

Flourine at the top

but the smallest of all

Every bond it makes

It keeps them close

Poison in its veins

that even water burns

Needed to live to eat

but too deadly to touch

Chlorine in the pool

bleaching the clothes

The yellow-green gas

be never inhaled alone

produced from brine

was a weapon in war

The 17 of seventeen

Discovered in 1774

Brown of bromine

is liquid with mercury

n' its organic friends

are all in fact fire-free

while tincture of iodine

that tints our cuts clean

is the purple-black solid

which reacts the least

Astatine n' Tenessine

the newest in house

radioactive and huge

but living a half life

of seconds and hours

are the rarerest to find

on earth's face or in labs

they are still a mystery

Halogens from Greece

A family forming salts

living beside the nobles

that rarely ever talk

In the periodic lane

In the city of chemistry

the seventeen of science

Is the one seven of rhyme

~KR

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