Gases
Start with the letter (C)
The Average Mass
Atomic number
One letter Element
100
Chemical element with symbol Rn and atomic number 86.
What is Radon
100
chemical element with an atomic number 55
What is Cesium
100
Mass is 1.01
What is Hydrogen
100
The atomic number of Helium
What is (2)
100
Has 19 Protons
What is Potassium
200
Chemical element with symbol Ar and atomic number 18.
What is Argon
200
Chemical element with symbol Cr and atomic number 24.
What is Chromium
200
The mass is 30.97
What is Phosphorus
200
What is the atomic number of Lanthanum
What is (56)
200
Has 23 electrons
What is Vanadium
300
Chemical element with symbol Kr and atomic number 36.
What is Krypton
300
chemical element with symbol Co and atomic number 27
What is Cobalt
300
The mass is 158.93
What is Terbium
300
What is the atomic number of Rutherfordium
What is (104)
300
The element letter is W
What is Tungsten
400
Chemical element with symbol Xe and atomic number 54.
What is Xenon
400
It rhymes with Fluorine
What is Chlorine
400
The mass is 140.91
What is Praseodymium
400
What is the atomic number of Neodymium
What is (60)
400

What you breathe?

What is Oxygen

500
The chemical element of atomic number 2.
What is Helium
500
atomic number 29 and it is a soft, malleable, and ductile metal with very high thermal and electrical conductivity.
What is Copper
500
The mass is 173.04
What is Ytterbium
500
What is the atomic number of Californium
What is (98)
500
Is a boring element?
What is Boron
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