Multiple Choice
The ozone layer absorbs most of the incoming _____ radiation.
Table of contents
- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
- Physical & Chemical Changes19m
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- 22. Organic Chemistry5h 7m
- Introduction to Organic Chemistry8m
- Structural Formula8m
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- Skeletal Formula6m
- Spatial Orientation of Bonds3m
- Intro to Hydrocarbons16m
- Isomers11m
- Chirality15m
- Functional Groups in Chemistry11m
- Naming Alkanes4m
- The Alkyl Groups9m
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- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
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- Main Group Elements: Density11m
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- The Electron Configuration Review16m
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- Production of Hydrogen8m
- Group 1A and 2A Reactions7m
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- Boron Family: Borane7m
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- Nitrogen Family Reactions12m
- Oxides, Peroxides, and Superoxides12m
- Oxide Reactions4m
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- Noble Gas Compounds3m
- 24. Transition Metals and Coordination Compounds3h 19m
- Atomic Radius & Density of Transition Metals11m
- Electron Configurations of Transition Metals7m
- Electron Configurations of Transition Metals: Exceptions11m
- Paramagnetism and Diamagnetism10m
- Ligands10m
- Complex Ions5m
- Coordination Complexes7m
- Classification of Ligands11m
- Coordination Numbers & Geometry9m
- Naming Coordination Compounds22m
- Writing Formulas of Coordination Compounds8m
- Isomerism in Coordination Complexes17m
- Orientations of D Orbitals4m
- Intro to Crystal Field Theory10m
- Crystal Field Theory: Octahedral Complexes5m
- Crystal Field Theory: Tetrahedral Complexes4m
- Crystal Field Theory: Square Planar Complexes4m
- Crystal Field Theory Summary8m
- Magnetic Properties of Complex Ions9m
- Strong-Field vs Weak-Field Ligands6m
- Magnetic Properties of Complex Ions: Octahedral Complexes11m
- 1. The Chemical World10m
2. Atoms & Elements
The Atom
Multiple Choice
Which element is the most abundant in air and has an atomic number of 7?
A
Oxygen
B
Carbon
C
Hydrogen
D
Nitrogen
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Verified step by step guidance1
Identify the atomic number given in the problem, which is 7.
Recall that the atomic number corresponds to the number of protons in an element's nucleus and uniquely identifies the element.
Use the periodic table to find the element with atomic number 7; this element is Nitrogen (N).
Understand that Nitrogen makes up about 78% of the Earth's atmosphere, making it the most abundant element in air.
Confirm that the other options (Oxygen, Carbon, Hydrogen) have different atomic numbers and are less abundant in air compared to Nitrogen.
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