객관식
Which statement is true of all atoms that are anions?
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2. Atoms & Elements
Ions
Multiple Choice
An atom has nine protons and ten electrons. This makes it:
A
an isotope
B
a positively charged ion (cation)
C
a neutral atom
D
a negatively charged ion (anion)
검증된 단계별 안내1
Identify the number of protons and electrons in the atom. Here, the atom has 9 protons and 10 electrons.
Recall that the number of protons determines the element's identity and its positive charge, while electrons carry negative charge.
Compare the number of protons and electrons: since there are more electrons (10) than protons (9), the atom has an overall negative charge.
Understand that an atom with more electrons than protons is called an anion, which is a negatively charged ion.
Conclude that the atom is a negatively charged ion (anion) because it has gained an extra electron compared to its number of protons.
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