Question

Classification of elements ? Answer

Answer 1

They are made of only one kind of atoms this answer was according to me

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Answer 2

Answer:

Answer:Each column is called a group. All elements in a group have similar chemical and physical properties because they have the same number of valence electrons. Periods - In periodic table elements are arranged in a series of rows. Elements of the same period have the same number of electron shells.

Answer:Each column is called a group. All elements in a group have similar chemical and physical properties because they have the same number of valence electrons. Periods - In periodic table elements are arranged in a series of rows. Elements of the same period have the same number of electron shells.