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Which of the following statements about the periodic table is true?
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2. Atoms & Elements
Periodic Table: Classifications
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Which of the following compounds contains a metal?
A
H2O
B
CH4
C
NaCl
D
CO2
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Identify the elements present in each compound: H2O contains hydrogen and oxygen; CH4 contains carbon and hydrogen; NaCl contains sodium and chlorine; CO2 contains carbon and oxygen.
Recall that metals are elements typically found on the left side and middle of the periodic table, characterized by properties such as conductivity and malleability.
Recognize that sodium (Na) is an alkali metal, which is a metal element, while hydrogen, carbon, oxygen, and chlorine are nonmetals.
Therefore, among the given compounds, only NaCl contains a metal element (sodium).
Conclude that NaCl is the compound that contains a metal.
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