Use your knowledge of the periodic table and the periodic table provided. which pair of elements are more similar chemically na and mg or f and br? and why?
a) f and br, because they are in the same group.
b) f and br, because they are in the same period.
c) na and mg, because they are in the same group.
d) na and mg, because they are in the same period.

A - F and BR, because they are in the same group

Explanation:

Studying chemistry, the periodic table is divided into groups in each vertical column. The fluorine and bromine elements cited in the question belong to the same group and have similar properties because these elements have the same number of electrons at the outermost level of energy (valence layer).

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.