The element platinum is composed of atoms that have 78 protons in their nuclei. This means that every platinum atom has 78 electrons orbiting its nucleus. The electrons are arranged in specific energy levels, or shells, around the nucleus. The first shell can hold up to 2 electrons, the second shell can hold up to 8 electrons, the third shell can hold up to 18 electrons, and so on.

Platinum atoms have a total of 78 electrons. The first two shells are filled, with 2 electrons in the first shell and 8 electrons in the second shell. The remaining 68 electrons are in the third, fourth, fifth, and sixth shells.

The outermost shell of electrons, called the valence shell, is the most important in determining the chemical properties of an element. Platinum atoms have 6 valence electrons. These electrons are loosely bound to the nucleus and are easily lost or shared with other atoms. This makes platinum a very reactive metal.

Platinum is a noble metal, which means that it is resistant to corrosion. This is because the valence electrons are strongly attracted to the nucleus and are not easily lost. However, platinum can still be corroded by certain chemicals, such as aqua regia, a mixture of nitric acid and hydrochloric acid.

Platinum is a very versatile metal and has many different uses. It is used in jewelry, dentistry, medicine, and electronics. It is also used as a catalyst in many chemical reactions.