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Chapter 22: Problem 11

Identify each of the following elements as a metal, nonmetal, or metalloid: (a) phosphorus, (b) strontium, (c) manganese, (d) selenium, (e) sodium, (f) krypton.

Short Answer

Expert verified
(a) Phosphorus is a nonmetal. (b) Strontium is a metal. (c) Manganese is a metal. (d) Selenium is a nonmetal. (e) Sodium is a metal. (f) Krypton is a nonmetal.

Step by step solution

01

(a) Phosphorus

Phosphorus has the symbol "P" and is found in group 15 of the periodic table. Elements in this group are nonmetals. Therefore, phosphorus is a nonmetal.
02

(b) Strontium

Strontium has the symbol "Sr" and is found in group 2 of the periodic table. Elements in this group are known as alkaline earth metals. Therefore, strontium is a metal.
03

(c) Manganese

Manganese has the symbol "Mn" and is found in group 7 as a transition metal in the periodic table. Transition metals are classified as metals due to their metallic properties. Therefore, manganese is a metal.
04

(d) Selenium

Selenium has the symbol "Se" and is found in group 16 of the periodic table. Elements in this group are commonly classified as nonmetals. Therefore, selenium is a nonmetal.
05

(e) Sodium

Sodium has the symbol "Na" and is found in group 1 of the periodic table. Elements in this group are known as alkali metals. Therefore, sodium is a metal.
06

(f) Krypton

Krypton has the symbol "Kr" and is found in group 18 of the periodic table. Elements in this group are known as noble gases which are nonmetals. Therefore, krypton is a nonmetal.

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