8. Write symbols of: (a) copper (b) mercury (c) iron (d) silver (e) gold (f)
argon
(g) zinc (h) cobalt (i) lead (j) potassium (k) silicon
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(1) Ca ; (2) Zn ; (3) Pb ; (4) Hg ; (5) Cu ; (6) Au ; (7) K : (8) Fe ; (9) AI (10) Na , (11) Mg (12) Pt , (13) Ag
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