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Periodic Puzzle: Breath of Life

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A riddle about a life-sustaining element.

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Periodic Puzzle: Breath of Life
 

Periodic Puzzle: Breath of LifeOnline version

A riddle about a life-sustaining element.

by jayseon
1

I am essential for life and make up about a fifth of Earth's atmosphere.

Hints

Vital for respiration and combustion

Atomic number 8

Symbol is O

2

The lightest element that fuels stars and lights the universe.

Hints

Fuel for stars

Has one proton and one electron

Most abundant element in the universe

3

A noble gas that makes balloons rise and bright signs glow.

Hints

Helps signs shine with a distinct glow

Second most abundant in the universe after hydrogen

Noble gas used in party balloons

4

A soft, light metal used to power many rechargeable devices.

Hints

Common in Li-ion batteries

Lightest metal

Key component of rechargeable batteries

5

The backbone of organic life, found in all living things and many rocks.

Hints

Atomic number 6

Exists as graphite and diamond

Foundation of organic chemistry

6

A diatomic gas that makes up most of Earth's atmosphere.

Hints

Atomic number 7

Primarily found as N2 in the air

Essential for amino acids and proteins

7

Vital element for respiration and combustion, abundant in air.

Hints

Atomic number 8

O2 is its common form

Breath of life

8

A bright-nap sign-making noble gas with a reddish glow.

Hints

Atomic number 10

Noble gas group

Used in luminous signs

9

A heavy metal famed for strength, core of earth and many alloys.

Hints

Atomic number 26

Key component of steel

Symbol Fe

10

A precious yellow metal, durable and highly valued for jewelry.

Hints

Atomic number 79

Resists corrosion

Symbol Au

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