Guess Who? Chemical Elements Edition

I am the lightest and most abundant element in the universe

• Helium (He)

• Oxygen (O)

• Hydrogen (H)

• Carbon (C)

Answer explanation

Approximately 73% of the mass of the visible universe is in the form of hydrogen

I am the most expensive element in the world

• Californium (Cf)

• Carbon-diamond

  (C)

• Platinum (Pt)

• Gold (Au)

Answer explanation

Californium – $25 million per gram

In today’s world, only a half-gram of Californium is produced each year. The primary use of the is element is as a portable source of neutrons for the detection of other elements.

The air in Earth's atmosphere is made up of approximately 78 percent by me.

• Hydrogen (H)

• Oxygen (O)

• Argon (Ar)

• Nitrogen (N)

Answer explanation

The atmosphere of Titan, the largest moon of Saturn, is primarily composed of nitrogen (98%).

It has been speculated that life could exist in the liquid methane and ethane that form rivers and lakes on Titan's surface

My symbol in the Periodic Table is J

• Jupiterium

• Jordanium

• None

• Japonium

Answer explanation

The letters “J” and “Q” are the only two letters not found on the periodic table

I am the second most common element in the universe, but I am very rare on the Earth

• Carbon (C)

• Helium (He)

• Lithium (Li)

• Sulfur (S)

Answer explanation

Stars are big exploding balls of gas, mostly made of hydrogen and helium

In 1937, I was the first element to be artificially produced.

• Technetium (Tc)

• Rutherfordium (Rf)

• Mercury (Hg)

• Bromine (Br)

Answer explanation

Technetium is commonly used in medical diagnostic scanner devices.

I am very famous because I can form up to 10 million different compounds.

• Xenon (Xe)

• Lithium (Li)

• Cobalt (Co)

• Carbon (C)

I am the most abundant element in human body.

• Carbon (C)

• Oxygen (O)

• Calcium (Ca)

• Plutonium (Pu)

Answer explanation

Oxygen is the most common element in the human body, comprising approximately 65.0% of body mass. Most of the oxygen present is found in the form of water.

Bromine (Br) and I are the only two liquid elements in the Periodic Table.

• Chlorine (Cl)

• Iron (Fe)

• Mercury (Hg)

• Lead (Pb)

Answer explanation

Mercury is the heaviest liquid substance on Earth.

I was named after the Father of the Periodic Table

• Nobelium (No)

• Polonium (Po)

• Mendelevium (Md)

• Fermium (Fm)

Answer explanation

Dmitri Mendeleev was a Russian chemist and is often referred to as the Father of the Periodic Table