How many neutrons does an atom of cobalt have?
The majority of elements on the Periodic Table are
Neutral lithium has three protons. During a chemical reaction, one electron is removed. How
many protons does lithium have now?
You must know what element lithium reacted with to determine this.
Oxygen and sulfur are in the same group on the Periodic Table because
they both contain eight protons.
they both contain 2 electrons.
they both share similar chemical properties.
they both are safe to breathe.
With the exception of the element hydrogen, the atomic number and the atomic mass of each
less than hydrogen
not listed on the Periodic Table