What is inside the atom — Flashcards
Telangana Board · Class 9 · Physical Science
24 flashcards for What is inside the atom (Telangana Board Class 9 Physical Science) to test yourself on key terms and facts.
Interactive on Super Tutor
Studying What is inside the atom? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for flashcards and more.
Free trial, no card needed.
According to Dalton's atomic theory, what were atoms supposed to be?
Answer
According to Dalton, atoms were indivisible particles that could not be divided into smaller parts. All atoms of the same element were identical, and atoms of different elements were different from ea…
Why did Michael Faraday's electrolysis experiments challenge Dalton's atomic theory?
Answer
Faraday discovered that atoms could gain or lose charges during electrolysis. This contradicted Dalton's idea that atoms were indivisible because neutral atoms becoming charged suggested the presence …
What are the three sub-atomic particles and their charges?
Answer
1. Electron (e⁻) - negatively charged with negligible mass 2. Proton (p⁺) - positively charged, mass 1836 times that of electron 3. Neutron (n⁰) - no charge, mass nearly equal to proton…
Why are atoms electrically neutral despite containing charged particles?
Answer
Atoms are neutral because they contain equal numbers of positively charged protons and negatively charged electrons. The positive and negative charges cancel each other out, making the overall charge …
Describe Thomson's 'plum pudding' model of the atom.
Answer
Thomson proposed that an atom is a sphere of uniform positive charge with electrons embedded in it like raisins in a pudding. The mass was uniformly distributed, and positive and negative charges bala…
What did Rutherford use in his famous scattering experiment and why?
Answer
Rutherford used fast-moving alpha particles (positively charged with 2 units of charge) and a thin gold foil. Alpha particles had enough energy to penetrate atoms, and gold could be made into very thi…
What were the key observations in Rutherford's alpha particle scattering experiment?
Answer
1. Most alpha particles passed straight through without deflection 2. Some particles deflected at small angles 3. Very few particles deflected at large angles 4. A tiny fraction (1 in 20,000) bounced …
Why did most alpha particles pass through the gold foil in Rutherford's experiment?
Answer
Most alpha particles passed through because most of the space inside atoms is empty. The electrons are very small and don't significantly obstruct the path of alpha particles, allowing them to pass th…
+16 more flashcards
Practise AllFrequently Asked Questions
What are the important topics in What is inside the atom for Telangana Board Class 9 Physical Science?
How many flashcards are available for What is inside the atom?
How should I revise What is inside the atom for Class 9 exams?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for What is inside the atom
For serious students
Get the full What is inside the atom chapter — start free.
Quizzes, flashcards, an AI doubt solver and a study plan for Telangana Board Class 9 Physical Science. Free to start, no card needed.