(b) Electronegativity across the period ………… [increases/decreases].
(c) Non-metallic character down the group ………… [increases/decreases].
(d) Atomic number of an element is 16. State
(i) to which period it belongs
(ii) the number of valence electrons in the element
(iii) is the element metal or non-metal
Answers:
(a) The number of electrons in the valence shell of a halogen is 7.
(b) Electronegativity across the period increases.
(c) Non-metallic character down the group decreases.
(d) The atomic number of an element is 16.
(i) The element belongs to period 3
(ii) 6 is the number of valency electrons in the element.
(iii) The element is a non-metal.