What are α-particles? from Chemistry Structure of Atom

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Structure of Atom

Short Answer Type

1. Name the fundamental particles which constitute an atom.

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2.

What is an Electron?

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3.

What is a proton?

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4.

Who discovered neutron?

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5. What is a neutron?

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6.

What is the name of the remaining part of atom except outer orbit?

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7.

Name the particles which determine the mass of an element.

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8.
What are α-particles?

Alpha particles consist of two protons and two neutrons bound together into a particle identical to a helium nucleus. Alpha particles are positively charged particles which carry 4 units mass and +2 units charge. These are same as the helium nuclei and are emitted from the radioactive substances like uranium, thorium etc.

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9. Why were neutrons discovered very late?

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10.

What are the fundamental particles present in a neutral atom having atomic number greater than 1?

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