Question

Write the atomic symbol (including the atomic number) for an isotope with 54 protons and 78 neutrons.

Answer 1

Answer:

132 54Xe

Explanation:

From the question given above, the following were obtained:

Proton = 54

Neutron = 78

Atomic number =?

Atomic symbol =.?

Next, we shall determine the atomic number of the isotope. This can be obtained as follow:

Atomic number of an element is simply defined as the number of protons in the atom of the element.

Thus,

Atomic number = proton number

Proton = 54

Atomic number = proton number = 54

Atomic number = 54

Therefore, the atomic number of the isotope is 54

Next, we shall determine the mass number of the isotope. This can be obtained as follow:

Proton = 54

Neutron = 78

Mass number =.?

Mass number = Proton + Neutron

Mass number = 54 + 78

Mass number = 132

Therefore, the mass number of the isotope is 132.

From the calculations made above, the isotope have:

Atomic number = 54

Mass number = 132

Comparing the atomic number with those in the periodic table, the isotope is Xenon (Xe).

Thus, the atomic symbol for the isotope is 132 54Xe.