Multiple Choice
Which of the following is a major reservoir of carbon in the Earth's system?
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- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
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- 23. Chemistry of the Nonmetals2h 39m
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- 24. Transition Metals and Coordination Compounds3h 19m
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- Ligands10m
- Complex Ions5m
- Coordination Complexes7m
- Classification of Ligands11m
- Coordination Numbers & Geometry9m
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- Isomerism in Coordination Complexes17m
- Orientations of D Orbitals4m
- Intro to Crystal Field Theory10m
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- Crystal Field Theory Summary8m
- Magnetic Properties of Complex Ions9m
- Strong-Field vs Weak-Field Ligands6m
- Magnetic Properties of Complex Ions: Octahedral Complexes11m
2. Atoms & Elements
The Atom
Multiple Choice
Which element has atoms that contain exactly 11 protons?
A
Sodium (Na)
B
Neon (Ne)
C
Potassium (K)
D
Magnesium (Mg)
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Verified step by step guidance1
Recall that the number of protons in an atom is called the atomic number, which uniquely identifies each element.
Look up the atomic numbers of the given elements: Sodium (Na), Neon (Ne), Potassium (K), and Magnesium (Mg).
Sodium (Na) has an atomic number of 11, meaning each sodium atom contains exactly 11 protons.
Neon (Ne) has an atomic number of 10, Potassium (K) has 19, and Magnesium (Mg) has 12 protons.
Therefore, the element with atoms containing exactly 11 protons is Sodium (Na).
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