Chemistry, asked by shoaibarshadsa1, 6 months ago

how many protons and electron does an element have ?

Answers

Answered by Anonymous

Answer:

For example, silicon has 14 protons and 14 neutrons. Its atomic number is 14 and its atomic mass is 28. The most common isotope of uranium has 92 protons and 146 neutrons. Its atomic number is 92 and its atomic mass is 238 (92 + 146)

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Answered by rajeevgupta39

Explanation:

The number of protons is the atomic number, and the number of protons plus neutrons is the atomic mass. For hydrogen, the atomic mass is 1 because there is one proton and no neutrons. For helium, it is 4: two protons and two neutrons.

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2.1 Electrons, Protons, Neutrons, and Atoms.

Element .

Symbol .

Atomic No. .

Number of Electrons in Each Shell First .

Second

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