Name.elements present in third period nd classify them in metals and non metals
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Metals
11. Sodium
12. Magnesium
Non metals
13. Aluminium
14. Silicon
15. Phosphurus
16. Sulphur
17. Chlorine
noble gas
18. Argon
11. Sodium
12. Magnesium
Non metals
13. Aluminium
14. Silicon
15. Phosphurus
16. Sulphur
17. Chlorine
noble gas
18. Argon
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