The element chlorine shares similar characteristics with fluorine. Both the elements are in same group 17. Their valency is same(7). Both of them are found in same state i.e. gaseous
calcium
calcium
potassium (K)
Potassium is a group 1/IA element, which is the alkali metals, so it shares characteristics with the rest of the elements in the group.
a concept
chlorine (Cl)
Sillicon
calcium
calcium
From the presence of the element fluorine, the molecules are spelled chlorofluorocarbons (CFCs).(*fluorine shares this "UO" spelling with the words fluorescent and fluorescence)
Calcium shares the most characteristics with magnesium.Both belongs to 2nd group of alkaline earth metals.
potassium (K)
Potassium is a group 1/IA element, which is the alkali metals, so it shares characteristics with the rest of the elements in the group.
a concept
The elements most similar to neon are the other noble gases in group 18. They include Helium, Neon, Argon, Krypton, Xenon, and Radon.
Calcium shares properties with Magnesium and Strontium.
Elements in the same family, or group will contain the same number of valence electrons and have many similar characteristics.