Question

(I WILL MEDAL AND FAN). What statement applies to the horizontal rows or periods in the periodic table? . . . . . . . . . A. . The properties are all the same. . . . . . . . . B. . The elements have the same number of electrons. . . . . . . . . C. . The properties change going across each row. . . . . . . . . D. . The elements in each row combine easily. .

Answer 1

In the periodic table, elements belonging to the same period or horizontal rows are elements with  B. The elements have the same number of electrons. The electrons referred here are valence electrons that reflect to the charge of each element. Answer to this problem is B.