Multiple Choice
Which type of elements typically form cations?
2
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2. Atoms & Elements
Ions
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Which of the following best describes what it means for two species to be isoelectronic?
A
They have the same chemical properties.
B
They have the same charge.
C
They have the same number of electrons.
D
They have the same number of protons.
Verified step by step guidance1
Understand the term 'isoelectronic': it refers to different species (atoms, ions, or molecules) that have the same number of electrons.
Recall that having the same number of electrons means these species have identical electron configurations, which can influence their chemical behavior.
Note that isoelectronic species do not necessarily have the same number of protons (atomic number) or the same charge; these can differ while the electron count remains the same.
Recognize that having the same chemical properties is not guaranteed by being isoelectronic, as chemical properties depend on nuclear charge and electron arrangement.
Therefore, the best description of isoelectronic species is that they have the same number of electrons.
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