an electric heater marked 1000W-250V is used daily for 2 hours. if the cost of the energy is rs 0.75 per unit ,calculate the total cost for 30 days
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Explanation:
(a) The electronic configuration represents
2s22p5= fluorine = most electronegative element
3s23p5 = chlorine
4s24p5 = bromine
5s25p5 = iodine
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