Hydrogen
Osmium has. Gold and iridium are up there too. Lead isn't even close.
Except for elements 1 and 2, all elements are stable with how many electrons in their outermost (valence) level?
Integration
Elements do not move around the nucleus since the nucleus is at the core of the element.
Rows of elements are called periods. The period number of an element signifies the highest unexcited energy level for an electron in that element. Columns of elements help define element groups. Elements within a group share several common properties. Groups are elements have the same outer electron arrangement.
Some elements are stable on their own because they have a complete outer energy level. These elements are called noble gases. Hydrogen and Helium have a complete energy level with two electrons and all of the other elements are stable with eight. When an element doesn't have a complete outer energy level it is stable in a compound. This is because it is being combined with another element to complete it's energy level.
what is the lowest level of the CNS
Implementation
It would be 3 electrons!Why?Antimony: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p3 Nitrogen: 1s2,,2s2,2p3Phosphorus: 1s2 2s2 2p6 3s2 3p3Arsenic: 3d10 4s2 4p3Bismuth: 4f14 5d10 6s2 6p3so on..
The lowest level of Earth's atmosphere is the troposphere. It is where we live and where weather occurs. It extends from the Earth's surface up to about 10-15 kilometers (6-9 miles) above the surface.
Elements cant be, unless you are talking about sub-atomic level. Substances can be broken down to elements possibly.
There is no specific lowest level of metabolism.