Multiple Choice
Which of the following pairs of elements have their valence electrons in the same shell?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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Which of the following statements correctly describes hydrogen?
A
Hydrogen is a metal and has 1 valence electron.
B
Hydrogen is a nonmetal and has 1 valence electron.
C
Hydrogen is a metal and has 2 valence electrons.
D
Hydrogen is a nonmetal and has 2 valence electrons.
Verified step by step guidance1
Recall the position of hydrogen on the periodic table: it is located in Group 1, but it is unique and not classified as a metal like the alkali metals.
Understand that hydrogen is generally considered a nonmetal because it shares more chemical properties with nonmetals, such as forming covalent bonds and existing as a diatomic gas (H₂) under standard conditions.
Identify the number of valence electrons in hydrogen: since hydrogen has an atomic number of 1, it has one electron, which is also its valence electron.
Evaluate the given statements by combining the correct classification (nonmetal) with the correct number of valence electrons (1).
Conclude that the statement 'Hydrogen is a nonmetal and has 1 valence electron' correctly describes hydrogen.
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