Multiple Choice
Which of the following is a trace element?
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2. Chemistry
Atoms- Smallest Unit of Matter
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An uncharged atom of nitrogen (atomic number = 7) has __________.
A
seven neutrons and six protons
B
seven protons and seven neutrons
C
seven neutrons and seven electrons
D
seven protons and seven electrons
Verified step by step guidance1
Identify the atomic number of nitrogen, which is given as 7. The atomic number represents the number of protons in an atom.
Since the atom is uncharged, the number of electrons must equal the number of protons to balance the positive and negative charges.
Therefore, an uncharged nitrogen atom must have 7 electrons, as it has 7 protons.
The number of neutrons is not directly given by the atomic number. However, a common isotope of nitrogen is nitrogen-14, which has 7 neutrons.
Thus, an uncharged nitrogen atom typically has 7 protons, 7 electrons, and 7 neutrons, making the correct answer: seven protons and seven electrons.
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