The symbol of an atom is X. Its nucleus contains 29 protons and 34 neutrons. Write its (a) mass number, (b) atomic number, (c) number of electrons, (d) write symbol of its nuclide.

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Solution

(a) Mass number = Protons + Neutrons

= 29 protons + 34 neutrons

= 63

Therefore, the mass number of X is 63. [0.5 Marks]

(b) Atomic number is the number of protons in the nucleus.

So, the atomic number of X is 29. [0.5 Marks]

(c) Number of electrons = Number of protons

So, the number of electrons in X is 29. [0.5 Marks]

(d) Symbol of the nuclide is $6329 X$ [0.5 Marks]

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The symbol of an atom is X. Its nucleus contains 29 protons and 34 neutrons. Write its (a) mass number, (b) atomic number, (c) number of electrons, (d) write symbol of its nuclide.​

The symbol of an atom is X. Its nucleus contains 29 protons and 34 neutrons. Write its (a) mass number, (b) atomic number, (c) number of electrons, (d) write symbol of its nuclide.