Based on regularities of the periodic system

Justify which of the elements is more pronounced metallic properties: a) calcium or barium b) magnesium or phosphorus
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������������Answered on March 31, 2015 11:57
�When moving along the RIGHT LEFT period, the metallic properties of the elements are STRENGTHENED. In the opposite direction non-metallic increase. When moving UPPER DOWN along the groups, the METAL properties of the elements are strengthened. Therefore, a) - at barium and b) - at phosphorus.
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������������Answered March 31, 2015 12:12
Metallic properties increase in the periodic system from right to left and top to bottom. See the table.