Multiple Choice
An atom has 34 protons and 36 electrons. What element is it (and what is the ion’s charge)?
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4. Atoms and Elements
Ions (Simplified)
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In a simplified model where an atom is neutral when it has equal numbers of protons and electrons, which of the following atoms is neutral?
A
An atom with 11 protons and 12 electrons
B
An atom with 11 protons and 10 electrons
C
An atom with 12 protons and 10 electrons
D
An atom with 11 protons and 11 electrons
Verified step by step guidance1
Recall that an atom is neutral when the number of protons (positively charged particles) equals the number of electrons (negatively charged particles).
Identify the number of protons and electrons for each atom given:
- Atom 1: 11 protons and 12 electrons
- Atom 2: 11 protons and 10 electrons
- Atom 3: 12 protons and 10 electrons
Compare the number of protons and electrons for each atom to check if they are equal:
- For Atom 1: 11 protons \( \neq \) 12 electrons (not neutral)
- For Atom 2: 11 protons \( \neq \) 10 electrons (not neutral)
- For Atom 3: 12 protons \( \neq \) 10 electrons (not neutral)
Since none of the given options except the one with 11 protons and 11 electrons have equal numbers, the neutral atom is the one with 11 protons and 11 electrons.
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