One
The 3rd shell can contain 18 electrons. The elements that have a 3rd shell as the outer shell are the the elements in period 3, where the 3s and 3p orbitals are filled to a maximum of 8 electrons. The 3d orbitals are filled in the 4th period in the transition elements.
idk but a chloride atom becomes a chloride ion wen it gains electrons so....
bonding
one, it's K, or potassium fill your shells (orbitals, really) in order until you get to 19 electrons K 2-8-8-1 one, it's K, or potassium fill your shells (orbitals, really) in order until you get to 19 electrons K 2-8-8-1
The thylakoid membrane contains 2 photosytems, known as Photosystem I and Photosystem II. Together, they function to absorb light and transfer energy to electrons.
Fluorine needs one more electron to have a stable octet, as it has 7 valence electrons and stable octet configuration is achieved with 8 electrons.
Magnesium would lose two electrons when reacting with fluorine to form magnesium fluoride. Magnesium, with two electrons in its outer shell, loses these electrons to achieve a stable octet configuration, while fluorine, needing one electron to complete its octet, gains one electron from magnesium.
You can see this happen in the F2 molecule. Each fluorine atom shares a valence electron with the other fluorine atom. So there is just one covalent bond.
Each sodium atom will lose one electron to achieve a complete octet in its outer shell, as the octet rule dictates atoms will gain or lose electrons to achieve a stable electron configuration with 8 electrons in the outer shell.
Seven electrons should be added to attain the higher noble gas configuration.
Strontium typically loses 2 electrons to satisfy the octet rule. Since strontium is in group 2 of the periodic table, it has 2 valence electrons. By losing these two electrons, it attains a stable electron configuration similar to a noble gas.
Fluorine can make one covalent bond, as it has seven valence electrons and needs one more electron to complete its octet.
Four
Gaining of 1 electron take Fluorine to nobel gas state
Beryllium will lose 2 electrons to satisfy the octet rule (to fill its outer shell).
1
Fluorine needs 8 valence electrons to have a filled outer energy level, following the octet rule. Fluorine naturally has 7 valence electrons, so it only requires one more electron to achieve a stable octet configuration.