Hydrogen and Helium
electron cloud refers to orbit present in the atom and electron can can be revolved by the orbit only as it is an imaginary path made of energy
Hydrogen only has one electron orbit, as it only has one electron.
The electron is the only thing in the atom is moving. It makes AA Eliptical Orbit around the positive charges. An Eliptical Orbit is a oval type of orbit around an object
A neutral atom of lithium has an electron configuration of 2,1. This means it has 1 electron in its outer shell.
Helium's electron structure is 1s2, meaning two electrons in the 1s orbital
hydrogen (H) and helium (He)
There is surprisingly little in common between the orbit of an electron and the orbit of a planet. It is magnetism that holds an electron in position and gravity that holds a planet in its orbit. If the electrons orbit was similar to the earths it would be able to loose energy at a constant rate and would crash into the proton. The electron can only loose energy in quantized amounts and is only aloud a canonical ensemble of values.
Each row in the table contains elements that have the same number of electron orbit shells. The first orbit, which is closest to the nucleus only has space for 2 electrons (no idea why, sorry). This is why only hydrogen (1 electron) and helium (2 electrons) are in the first row. The second row has the same inner shell, with 2 electrons and an outer shell with room for 8...and so on.
name the group of elements that have only one electron in their outermost energy level
The elements in wide form periodic table column 1.
alkali metals (group 1 elements)