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характеристика атома

знайди елемент

QuestionAnswer
елемент 4 періода 5 групи головної підгрупи Арсен
елемент,що має 12 протонів Магній
Галоген 3 періоду Хлор
найлегший лужний метал Літій
найактивніший метал Цезій (Францій)
елемент, що має 15 електронів Фосфор
найлегший інертний газ Гелій
елемент 4 періода, що може віддати 2 електрони Кальцій
Created by: olena45
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