Multiple Choice
Which of the following statements is true concerning the structure of the atom?
2. Atoms & Elements
The Atom
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Nitrogen has an atomic number of seven. How many electron shells does it likely have?
A
4
B
1
C
2
D
3
Verified step by step guidance1
Identify the atomic number of nitrogen, which is 7. This number indicates the number of protons and, in a neutral atom, the number of electrons as well.
Understand that electron shells are organized by energy levels, with the first shell holding up to 2 electrons, the second shell holding up to 8 electrons, and so on.
Determine how many electrons can fit into the first shell. The first shell can hold a maximum of 2 electrons.
Subtract the number of electrons in the first shell from the total number of electrons. For nitrogen, this leaves 5 electrons (7 total - 2 in the first shell).
Place the remaining electrons in the second shell. Since the second shell can hold up to 8 electrons, all 5 remaining electrons fit into the second shell, indicating that nitrogen has 2 electron shells.
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