Write the correct symbol in standard form for the isotope of platinum that contains 118 neutrons.

To find the correct symbol in standard form for the isotope of platinum that contains 118 neutrons, we first need to understand how atomic symbols are written.

Atomic symbols consist of the element's symbol, atomic number, and mass number. The atomic number represents the number of protons in the nucleus of an atom, while the mass number represents the sum of protons and neutrons.

In the periodic table, the symbol for platinum is Pt, and its atomic number is 78.

To determine the correct mass number, we need to consider that the mass number is the sum of protons and neutrons, which means it is equal to the number of neutrons plus the atomic number.

In this case, the isotope of platinum contains 118 neutrons. Therefore, the mass number is equal to 118 + 78 = 196.

Putting it all together, the correct symbol in standard form for the isotope of platinum with 118 neutrons is:

^196Pt