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    Learn English > English lessons and exercises > English test #125837: Infinitely small
    > Other English exercises on the same topics: Geography, history, politics, literature... | Making portraits, describing | Nature [Change theme]
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    Infinitely small


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    English exercise "Infinitely small" created by baboune16 with The test builder. [More lessons & exercises from baboune16]
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    1. have an electric charge which is used as a standard unit of charge for subatomic particles called the elementary charge.

    2. are massless, so they always move at the speed of light in vacuum.

    3. Water is a simple consisting of one oxygen atom bonded to two hydrogen atoms.

    4. An is an atom that has more electrons than protons, and so has a negative charge.

    5. The is a small region consisting of neutrons and protons at the centre of an atom.

    6. The are the result of collisions between gaseous particles in the atmosphere with particles released from the sun's atmosphere.

    7. Sodium chloride NACL is an , better-known as table salt.

    8. In Physics, a charged is a particle charged with an electric charge, for instance proton or electron.

    9. A is a machine that uses electomagnetic fields to propel charged particles to very high energies and speeds.

    10. can be artificially generated by heating a neutral gas or subjecting it to a strong electromagnetic field.










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