which of these statement is correct about the layout of the periodic law?
A. the columns are called the groups which indicate the highest energy levels of the atoms in that column.
B. the rows are called the periods which indicate the highest energy levels of the atoms in that row
C. the rows are called groups or families where elements have similar electron configurations
D. the columns are called in the periods where elements have similar electronic configurations
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Answer:
B.
Explanation:
elements are arranged in increasing order of atomic number i.e. number of protons.