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Question
Name the particles which revolve around the nucleus.
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Solution
Electron.
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Electron, proton, neutron are the types of ______ in an atom.
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Define – Atom.
Project.
To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.
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Dalton’s atomic theory successfully explained
(i) Law of conservation of mass
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(iii) Law of radioactivity
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Statement II: Atoms of each element are stable and emit their characteristic spectrum.
In the light of the above statements, choose the most appropriate answer from the options given below:
