Question

Which elements are most likely to undergo the same reactions, those in a group or those in a period?

Answer 1

Наибольшая вероятность протекания одних и тех же реакций у элементов, находящихся в главной подгруппе одной группы. В периодах химические свойства элементов изменяются. Если учесть, что все химические элементы условно делят на металлы и неметаллы, то вероятность протекания одних и тех же реакций возможна для элементов-металлов и элементов-неметаллов.

Answer 2

Elements in a group are more likely to undergo the same reactions than elements in a period. In the periodic table, elements are organized into periods (horizontal rows) and groups (vertical columns).

Elements in the same group have similar chemical properties because they have the same number of valence electrons (electrons in the outermost energy level). Valence electrons determine an element's reactivity and its ability to form chemical bonds. Elements in the same group often exhibit similar patterns in their chemical reactions and tend to form similar types of compounds. For example, the alkali metals (Group 1) are highly reactive and readily form ionic compounds with halogens (Group 17).

On the other hand, elements in the same period may have different numbers of energy levels and valence electrons. As a result, they tend to have different chemical properties and react differently. Elements in the same period generally show a gradual change in their properties as you move across the period from left to right.

Therefore, elements in a group are more likely to undergo the same reactions due to their similar electronic configurations and valence electrons, whereas elements in a period generally have different reactivity patterns.