Multiple Choice
Which of the following correctly represents the atomic symbol and mass number for an atom containing 50 protons and 64 neutrons?
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- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
- Physical & Chemical Changes19m
- Chemical Properties7m
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- 2. Atoms & Elements4h 16m
- The Atom9m
- Subatomic Particles15m
- Isotopes17m
- Ions27m
- Atomic Mass28m
- Periodic Table: Classifications11m
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- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
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- Noble Gas Compounds3m
- 24. Transition Metals and Coordination Compounds3h 16m
- Atomic Radius & Density of Transition Metals11m
- Electron Configurations of Transition Metals7m
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- Ligands10m
- Complex Ions5m
- Coordination Complexes7m
- Classification of Ligands11m
- Coordination Numbers & Geometry9m
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- 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
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many oxygen atoms are present in a single molecule of water (H_2O)?
A
0
B
3
C
1
D
2
Verified step by step guidance1
Identify the chemical formula of the molecule given, which is water (H_2O).
Understand that the subscript number in a chemical formula indicates the number of atoms of that element in one molecule.
Look at the subscript next to oxygen (O) in H_2O. Since there is no subscript explicitly written next to O, it means there is exactly 1 oxygen atom.
Confirm that the subscript '2' next to hydrogen (H) means there are 2 hydrogen atoms, but this does not affect the count of oxygen atoms.
Conclude that a single molecule of water contains 1 oxygen atom.
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