ionic bond
One atom of sodium has one electron in its outermost orbital.
The electrons in the outermost shell or orbital are called valence electrons. These electrons are involved in forming chemical bonds with other atoms.
The M orbital, there's only 1 electron in it.
Calcium's outermost electrons occupy the 4s orbital.
C = 1s2,2s2,2p2 so the outermost (2p) orbital has 2 electrons in Ground State
Chlorine is MUCH more likely to fill its outermost orbital by gaining electrons.
Electrons (that too the valence electrons or electrons in the outermost shell / orbital) are involced in bond formation.
Electrons are distributed using 2n2 formula, where n = 1,2,3,4,5...........i.e. no of orbital! hence for 1st orbital, no. of electrons = 2*(1)2 = 2*1 = 2 similar procedure for other orbitals also! bt still if any orbital, except 1st, contains 8 electrons it is considered to be stable! Total electrons in sulphur atom = 32 1st orbital = 2 2nd orbital = 8 3rd orbital = 18 4th orbital = 4 Electron in outermost(here, 4th) orbital = 4
elements, or atoms, do not have valence numbers, they have valence orbitals (the outermost one) or valence electrons (all the electrons in the outermost orbital). you can look this up anywhere that shows the electron configuration, like your periodic table.
Orbital x ray
The element belongs to Group 3 of the periodic table. This is because the outermost electron configuration is 3d^(1)4s^(2), where the d orbital has one electron and the ns orbital has two electrons.
The number of electrons usually does not equal the number of protons. Valence means outermost. In an electrically neutral atom (which in Gen Chem is the only atoms you will be dealing with) the number of outermost electrons usually does not equal the number of protons. Chlorine has 7 valence electrons but it has 17 protons and if it is electrically neutral (which in gen chem it almost always is) it has 17 electrons. Gen Chem 1: it has 2 electrons in the first shell then it has 8 electrons in the second shell then it has 7 electrons in the outermost shell Gen Chem 2: it has 2 electrons in the 1s orbital then it has 2 electrons in the 2s orbital then it has 6 electrons in the 2p orbital then it has 2 electrons in the 3s orbital then it has 5 electrons in the 3p orbital