Three: 1s2,2s2, 2p5.
14
14
The Element homogaynium has 69 valence electrons in no shell! They just bump into each other all day long
One bond.
Subshells are divisions of electron shells by their orbital occupation and their principle energy level. The orbitals are divided into s, p, d, and f configurations and can exist in multiple subshells at different energy levels.
F, fluorine, is the most electronegative element of all.
Energy levels are formed into sublevels which contain specific numbers of orbitals, each of which can contain two electrons with opposite spins. The s sublevel has 1 orbital, the p sublevel has 3 orbitals, the d sublevel has 5 orbitals, and the f sublevel has 7 orbitals.
The Element homogaynium has 69 valence electrons in no shell! They just bump into each other all day long
There are four energy sublevels in the fourth energy levels: 4s, 4p, 4d, and 4f.
There are 4. S , P, D and F
Rb
The electron cloud is divided into s, p, d, and f orbitals. These orbitals also occur at different principle energy levels.
The energy sublevel (s, p, d ,f) is always the same.
subtract two from the period number
This is a somewhat difficult question to answer without a picture but for the left (first) two columns of the periodic table (S Block) and the right (last) six columns (P block) the number of energy levels is the row number of where that atom is on a periodic table (these blocks together are known as the representative elements). For the middle part (transition elements, or D block) the number of energy levels is equal to the row number the element is in, minus one. So for example, Lithium (Li) has two energy levels. In another example, Iron (Fe) has three energy levels. For the inner-transition elements (a.k.a. the lanthanide and actinide, or F block) the number of energy levels is the row number (Lan - row 6, Act - row 7), minus two. So in example, Uranium (U) has 5 energy levels).
14
14
One bond.
Sub shells or sub energy levels, s,p,d,f , they are represented by Azimuthal quantum number 'l'.