Answer:
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Explanation:
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The atom of chlorine has <span>several valence electrons in its</span> valence electrons are in the third shell.
Answer:
non-metal
Explanation:
The element has 5 electrons on last energy level, so given element is non-metal. Most Metals have 1 or 2 electrons on the last level.
The first man-made element or artificial element which is produced because it is not found naturally in nature is Technicium, in 1937. Technicium has an atomic number of 43 and atomic mass of 98 g/mol.