Multiple Choice
What charge will chlorine have when it gains one electron?
2. Atoms & Elements
Ions
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Which of the following represents a species with 39 protons and 36 electrons?
A
Yttrium ion (Y³⁺)
B
Strontium ion (Sr²⁺)
C
Rubidium ion (Rb⁺)
D
Zirconium ion (Zr⁴⁺)
Verified step by step guidance1
Identify the element with 39 protons. The number of protons determines the element, and 39 protons correspond to the element Yttrium (Y).
Determine the charge of the ion by comparing the number of protons to the number of electrons. An ion with 39 protons and 36 electrons has lost 3 electrons.
Calculate the charge of the ion. Since electrons are negatively charged, losing 3 electrons results in a charge of +3.
Match the calculated charge with the given options. The ion with a +3 charge is the Yttrium ion (Y³⁺).
Verify the answer by ensuring that the number of protons and the charge match the description of the Yttrium ion (Y³⁺), which has 39 protons and a +3 charge due to having 36 electrons.
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