Three More Commonly Known Elements

Hydrogen (H)

Hydrogen is a chemical element; it has symbol H and atomic number 1. It is the lightest element and, at standard conditions, is a gas of diatomic molecules with the formula H₂, sometimes called dihydrogen, but more commonly called hydrogen gas, molecular hydrogen or simply hydrogen.

Three cool facts about Hydrogen

1. It has the least of most things.
2. Hydrogen is the most common element in the universe.
3. It makes up about 75% of its mass.

Helium (He)

Helium is a chemical element; it has symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas and the first in the noble gas group in the periodic table. Its boiling point is the lowest among all the elements, and it does not have a melting point at standard pressures.

Three cool facts about Helium

1. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas.
2. And it was one of the first in the noble gas group in the periodic table.
3. It was in the sun's corona that helium was first detected.

Lithium (Li)

Lithium is a chemical element; it has symbol Li and atomic number 3. It is a soft, silvery-white alkali metal. Under standard conditions, it is the least dense metal and the least dense solid element.

Three cool facts about Lithium

1. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas.
2. And it was one of the first in the noble gas group in the periodic table.
3. It was in the sun's corona that helium was first detected.

Sorces

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