Identify whether each element is a halogen, a noble gas, or nonmetal only. astatine (at): nitrogen (n): krypton (kr): chlorine (cl): sulfur (s):

Astatine and chlorine are halogens onlyNitrogen and sulphur are non metals onlyKrypton (Kr) is noble gas only

Explanation

Krypton (Kr) is noble gas only because it present in group 8 A that is known as noble gases.Nitrogen is present in group 5A which act as non metalSulphur is present in group  6 A which act as non metalAstatine and chlorine are known as halogens because they are present in group 7 A of the periodic table

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