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Which subatomic particle determines the identity of an element?
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2. Atoms & Elements
The Atom
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How many neutrons are present in the nucleus of a standard hydrogen atom?
A
0
B
2
C
1
D
3
Guida verificata passo dopo passo1
Identify the isotope of hydrogen being referred to. A standard hydrogen atom is the most common isotope, known as protium.
Recall that the atomic number (Z) of hydrogen is 1, which means it has 1 proton in its nucleus.
Understand that the number of neutrons (N) in an atom is given by the difference between the mass number (A) and the atomic number (Z): \(N = A - Z\).
For standard hydrogen (protium), the mass number (A) is 1 because it has only 1 proton and no neutrons.
Calculate the number of neutrons: \(N = 1 - 1 = 0\), so there are zero neutrons in the nucleus of a standard hydrogen atom.
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