Chemistry
State how density and melting points of elements varies across a period and down a group.
Periodic Table
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Answer
(i) Density — Density of elements across a period increases gradually to maximum and then it decreases slightly. Down a group density of elements increases gradually.
(ii) Melting point — Across a period from left to right, melting point increase upto group 14(IV A) and then decreases. The melting point of metals decrease down the group. The melting point of non-metals increase going down a group
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