It is neither. It is the central part of an atom.
Element
It is classified as a rare earth element.
is the element boron abundant or rare on earth
Promethium is a rare artificial element.
Berkelium is an artificial element, extremely rare, unstable and the preparation is very difficult.
No. It is the third most common gas in the atmosphere.
In chemistry, the nucleus is the center of an atom and contains the protons and neutrons. In biology, the nucleus is the cell organelle that contains the genetic material.
Very common - sodium is found in table salt, for instance.
They have the same number of protons in the nucleus and same number of electrons surrounding the nucleus.
They have the same number of protons in the nucleus and same number of electrons surrounding the nucleus.
Atoms, ions, and isotopes of an element all have the same number of protons in their nucleus, which determines the element's identity.
Mercury is an extremely rare element in the Earth's crust. However, its ores (mainly the red colored ore called "cinnabar") are extremely concentrated as it does not react to form may minerals. It is found in young mountain areas where deep seated rocks have been brought to the surface and deposits are found in Peru, Mexico, The US, Spain, Italy, China, Kyrgyzstan and Slovenia.