Chemistry
(a) The number of electrons in the valence shell of a halogen is …………… A — 1, B — 3, C — 5, D — 7.
(b) Electro negativity across the period …………… [increases/decreases].
(c) Non metallic character down the group …………… [increases/decreases].
(d) Atomic number of an element is 16. State :
- To which period it belongs.
- The number of valence electrons in the element.
- Is the element a metal or a non metal.
Periodic Table
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Answer
(a) The number of electrons in the valence shell of halogen is 7.
(b) Electro negativity across a period increases.
(c) Non metallic character down the group decreases.
(d) Element with atomic number 16:
- It belongs to the 3rd period.
- The number of valence electrons are 6.
- It is a non metal.
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