Multiple Choice
How many electrons occupy the outer energy level of most atoms that are chemically stable?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many valence electrons are present in a molecule of H2S?
A
8
B
6
C
2
D
4
Verified step by step guidance1
Identify the valence electrons for each atom in the molecule. Hydrogen (H) has 1 valence electron, and sulfur (S) is in group 16, so it has 6 valence electrons.
Determine the number of atoms of each element in the molecule H\_2S: there are 2 hydrogen atoms and 1 sulfur atom.
Calculate the total valence electrons contributed by hydrogen atoms: multiply the number of hydrogen atoms by their valence electrons, which is 2 \times 1.
Calculate the total valence electrons contributed by the sulfur atom: 1 \times 6.
Add the valence electrons from hydrogen and sulfur together to find the total valence electrons in the H\_2S molecule.
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