Question

9
determine the identity of the following element:
this element has 5 valence electrons, shows properties of metals and nonmetals, and has 33 protons in the nucleus of each atom.
a. silicon
b. tellurium
c. chromium
d. arsenic
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Explanation:

The number of protons equals the atomic number. An element with 33 protons has an atomic number of 33, which corresponds to arsenic. Arsenic has 5 valence electrons and is a metalloid (shows properties of metals and nonmetals), matching all given descriptions.

Answer:

D. arsenic