Radioactivity
ICSE · Class 10 · Physics
Flashcards for Radioactivity — ICSE Class 10 Physics. Quick Q&A cards covering key concepts, definitions, and formulas.
Interactive on Super Tutor
Studying Radioactivity? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for flashcards and more.
1,000+ Class 10 students started this chapter today
Learn better with visuals Super Tutor has hundreds of illustrations like this across every chapter — all free to try.
Get startedState the structure of an atom.
Answer
An atom has three particles: proton, neutron, and electron. Protons and neutrons are concentrated in the nucleus. Electrons revolve around the nucleus in closed circular orbits. The atom is electrical…
A nucleus has atomic number Z = 11 and mass number A = 23. Find the number of protons, electrons, and neutrons.
Answer
Given: Z = 11, A = 23 Formula: Number of neutrons = A - Z Step 1: Protons = Z = 11 Step 2: Electrons = 11, because the atom is neutral Step 3: Neutrons = A - Z = 23 - 11 = 12 Answer: Protons = 11, ele…
Define isotopes with one example.
Answer
Elements having the same atomic number but different mass numbers are called isotopes. Example: hydrogen has three isotopes: protium, deuterium, and tritium. They have the same atomic number 1 but dif…
A pair of atoms has mass number 23, but atomic numbers 11 and 12. What are they called?
Answer
Atoms of different elements having the same mass number but different atomic numbers are called isobars. Example: Na-23 and Mg-23 are isobars.
A pair of atoms has atomic numbers 11 and 12, but both have 12 neutrons. What are they called?
Answer
Atoms having different numbers of protons but the same number of neutrons are called isotones. Example: Na-23 and Mg-24 are isotones because both have 12 neutrons.
State the discovery of radioactivity.
Answer
Henry Becquerel discovered radioactivity after observing that uranium and its salts emit radiations called Becquerel rays. These radiations are of three types: alpha, beta, and gamma.
Why does alpha radiation deflect less than beta radiation in electric and magnetic fields?
Answer
Alpha particles have much greater mass than beta particles. Even though alpha particles are positively charged, their large mass makes their deflection smaller. Beta particles are much lighter, so the…
State the properties of an alpha particle.
Answer
An alpha particle is a doubly ionised helium nucleus. It is positively charged, has mass about 6.68×10^-27 kg, and charge +3.2×10^-19 C. Its speed is about 3×10^7 m/s. It has very high ionising power,…
+27 more flashcards available
Practice AllFrequently Asked Questions
What are the important topics in Radioactivity for ICSE Class 10 Physics?
How to score full marks in Radioactivity — ICSE Class 10 Physics?
How many flashcards are available for Radioactivity?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Radioactivity
Practice Quiz
Test yourself with a quick quiz
Important Questions
Practice with board exam-style questions
Revision Notes
Key points for last-minute revision
Formula Sheet
All formulas in one place
Chapter Summary
Understand the chapter at a glance
Concept Maps
See how topics connect visually
Study Plan
Step-by-step plan to ace this chapter
Syllabus
What topics to cover
NCERT Solutions
Every textbook question solved step by step
For serious students
Get the full Radioactivity chapter — for free.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for ICSE Class 10 Physics.