The energy is said to be given off as a photon of light.
Phosphorescence.
bond formation (ionic bond)
emission
Conduction
. Through the transfer of electrons between atoms
Neon (Ne, #10) has 8 electrons in its outermost shell. This is a very stable arrangement of electrons; in fact, many other elements either lose or gain electrons in order to achieve this same arrangement that neon already has. For that reason, neon is inert, meaning it does not react. It is neither the reactant nor the product in chemical reactions.
An atom with two valence electrons in its outermost energy level can achieve a stable electron configuration by losing two electrons. This process is known as ionization. By doing so, the atom becomes a positively charged ion, known as a cation, with a full outer energy level.
loses 2 electrons to achieve a noble gas configuration
Group 13A elements, also known as boron group, tend to lose three electrons during chemical reactions. This is because they have three valence electrons in their outermost energy level. Losing these electrons allows them to achieve a stable octet configuration and form a +3 charge.
To achieve octet configuration (stable)
Strontium. They both have two electrons in their outermost energy level, however since the electrons are farther from the nucleus in Strontium than in Calcium, Strontium is more readily able to shed these two electrons to achieve a more stable state with it's outermost energy level being complete (with 8 electrons).
Two. Oxygen as the electronic configuration of 1s2, 2s2 2p4 and needs 2 electrons to achieve te "octet" of neon.
They achieve stable configuration by sharing their electrons in their outermost shell.
By transfer or sharing of electrons.
electrons
Valency is not the no. of electrons in the outermost shell. It is the no. of electrons an atom has to lose or gain or share to achieve the electronic configuration of nearest noble gas and bcome stable. However, Helium has only K-shell which is complete. Hence it is stable and a noble gas. Therefore, its valency is zero.
Chlorine atoms have 7 outermost electrons and need to gain an electron to achieve the stability of a full valence shell.
. Through the transfer of electrons between atoms
Neon (Ne, #10) has 8 electrons in its outermost shell. This is a very stable arrangement of electrons; in fact, many other elements either lose or gain electrons in order to achieve this same arrangement that neon already has. For that reason, neon is inert, meaning it does not react. It is neither the reactant nor the product in chemical reactions.
Silicon has the atomic no. of 14 and has 4 electrons in its outermost shell. Thus,in order to make bonds it must loose or gain 4 electrons in order to achieve stable configuration but this process requires lot of energy. Therefore, silicon mostly makes bonds by sharing its electrons.
If you're asking how will an atom with 5 valence electrons will achieve a full set of valence electrons, then the answer would be that they bond with other atoms to gain a full set of the valence electrons by sharing or gaining 3 electrons.