Scelta multipla
What is the overall electrical charge of any neutral chemical compound?
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2. Atoms & Elements
Ions
Scelta multipla
Which of the following is the number of protons in the sulfide ion, S^{2-}?
A
14
B
16
C
18
D
2
Guida verificata passo dopo passo1
Recall that the number of protons in an atom or ion is determined by its atomic number, which is unique to each element and does not change when the atom gains or loses electrons.
Identify the element in question: the sulfide ion is derived from sulfur, which has the chemical symbol S.
Look up the atomic number of sulfur on the periodic table; this number represents the number of protons in a sulfur atom.
Understand that the charge on the ion (2-) indicates the gain of two electrons, but this does not affect the number of protons.
Conclude that the number of protons in the sulfide ion S^{2-} is equal to the atomic number of sulfur.
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