Structure of Atom — Class 11 Chemistry NCERT Solutions (Free)
Free step-by-step NCERT solutions for Class 11 Chemistry chapter "Structure of Atom" — 8 important questions with detailed answers for CBSE board exam preparation.
TL;DR: Free step-by-step NCERT solutions for Class 11 Chemistry chapter "Structure of Atom" — 8 important questions with detailed answers for CBSE board exam…
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Key Questions Covered:
- An atom of element X has 12 protons and 14 neutrons. Write its atomic notatio…
- What are isotopes? Give an example and explain why they have similar chemical…
- Describe the Bohr model of the atom and state its limitations.
- + 5 more questions in the full chapter
Solutions Summary:
| Question | Status |
|---|---|
| An atom of element X has 12 protons and 14 neutrons. Writ… | ✓ Solved |
| What are isotopes? Give an example and explain why they h… | ✓ Solved |
| Describe the Bohr model of the atom and state its limitat… | ✓ Solved |
Showing 3 of 8 questions
Q1: An atom of element X has 12 protons and 14 neutrons. Write its atomic notation and identify the element.
Given:
Number of protons = 12
Number of neutrons = 14
Step 1: Determine atomic number.
Atomic number (Z) = Number of protons = 12
Step 2: Determine mass number.
Mass number (A) = Number of protons + Number of neutrons
Mass number (A) = 12 + 14 = 26
Step 3: Identify the element.
An atom with 12 pr...
Q2: What are isotopes? Give an example and explain why they have similar chemical properties but different physical properties.
Definition of Isotopes:
Isotopes are atoms of the same element that have the same atomic number (same number of protons) but different mass numbers (different number of neutrons).
Example:
Carbon has three naturally occurring isotopes:
1. ¹²C (6 protons, 6 neutrons) — most abundant
2. ¹³C (6 proton...
Q3: Describe the Bohr model of the atom and state its limitations.
Bohr Model of the Atom:
The Bohr model (1913) proposed that:
1. Electrons revolve around the nucleus in fixed circular orbits (called shells or energy levels).
2. Each orbit has a specific fixed energy, and electrons in an orbit do not radiate energy.
3. Electrons can jump between orbits by absorbi...
Showing 3 of 8 questions. Visit the full page for complete solutions.