객관식
Which of the following is the number of protons in a silicon (Si) atom?
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- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
- Physical & Chemical Changes19m
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- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
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- The Electron Configuration Review16m
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- Atomic Radius & Density of Transition Metals11m
- Electron Configurations of Transition Metals7m
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- Ligands10m
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- Coordination Numbers & Geometry9m
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- Orientations of D Orbitals4m
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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
객관식
How many oxygen atoms are present in a single molecule of water (H_2O)?
A
1
B
2
C
3
D
0
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검증된 단계별 안내1
Identify the chemical formula of the molecule given, which is H_2O for water.
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 after O, it means there is exactly one oxygen atom.
Recognize that the subscript '2' applies only to hydrogen (H), indicating two hydrogen atoms.
Conclude that a single molecule of water contains one oxygen atom.
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