An element has electronic configuration 2, 8, 7. (i) To which group and period of the periodic table does it belong ?
An element has electronic configuration 2, 8, 7.
(i) To which group and period of the periodic table does it belong ?
(ii) What is atomic number of this element ?
(iii) Is it metallic or non-metallic and why ?
(iv) Identify the element.
(v) Name an element chemically similar to this element
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(i) Group 17, Period
(ii) 17.
(iii) It is non-metallic because it has 7 valence electrons.
It can gain 1 electron easily forming a negative ion.
(iv) Chlorine.
(v) Bromine or Iodine or Fluorine are chemically similar to chlorine
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