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Does a ground state of atom actually exist on our planet or every atom or molecule is just somehow excited because of all the energy flying around?
An atom is the basic unit of matter and the smallest particle of an element that still retains the properties of that element. It is composed of a nucleus, containing protons and neutrons, surrounded by electrons.
The size of an atom can vary based on the element, but on average, an atom has a diameter of about 0.1 nanometers (nm) or 1 x 10^-10 meters.
It is impossible to determine the exact number of atoms in the universe, but it is estimated to be around 10^78 atoms. This number is constantly changing as atoms are created and destroyed through nuclear reactions.
Hydrogen is the most abundant element in the universe, making up about 75% of all matter. It is found in stars, gas clouds, and planets, making it a crucial element for the formation of the universe.
As of now, there are 118 known types of atoms, or elements, on the periodic table. These elements range from hydrogen to oganesson and each has its own unique properties and characteristics.