Multiple Choice
An atom has an atomic number of 7. What is the most likely number of valence electrons for this atom?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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Which of the following is the correct number of valence electrons for the molecule NH2OH (hydroxylamine)?
A
10
B
12
C
14
D
16
Verified step by step guidance1
Identify the atoms present in the molecule NH2OH: nitrogen (N), hydrogen (H), and oxygen (O).
Determine the number of valence electrons for each atom based on their group in the periodic table: nitrogen has 5 valence electrons, oxygen has 6 valence electrons, and hydrogen has 1 valence electron.
Count the number of each type of atom in NH2OH: there is 1 nitrogen atom, 3 hydrogen atoms (2 from NH2 and 1 from OH), and 1 oxygen atom.
Calculate the total valence electrons by multiplying the number of each atom by its valence electrons and summing them up: total valence electrons = (1 × 5) + (3 × 1) + (1 × 6).
Sum these values to find the total number of valence electrons in NH2OH.
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