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The electrons surrounding the nucleus of an atom are in fixed 'layers' - with a defined number of electrons in each 'shell'. Stable atoms have a fixed number of electrons in their outer shell.
When two atoms combine (to form a molecule) one electron is 'discarded' and the two atoms share a common electron to keep the molecule stable. The electron that's 'discarded' is said to be 'lost'. The electrons are still present - just 'free-floating'.
When two atoms split, they 'grab' a free-floating electron to stabilise the molecule again. This electron is said to have been 'gained'.
What else can I help you with?
When compounds gain electrons they lose or gain energy?
Lose
When atoms lose or gain electrons they from?
When atoms lose or gain electrons, they form ions. These are charged particles.
Will Se lose or gain electrons and how many?
Se will gain electrons
The lose of electrons from a molucule is called?
Lose electrons is oxidation. To gain electrons is reduction.
How many electrons does Si gain or lose?
Silicon (Si) can gain or lose 4 electrons. It can either gain 4 electrons to have a stable octet configuration or lose 4 electrons to achieve a stable configuration.
Do metasls gain electrons?
If you mean Metals... No, they do not gain electrons, they actually lose electrons because it is a lot easy for them to lose them so they can gain stability much faster.
Does copper gain or lose electrons?
it loses electrons
What do ions gain or lose?
Electrons
Do atoms lose protons but seldom lose or gain electrons?
Atoms typically do not lose protons because that would change the identity of the element. Instead, atoms can lose or gain electrons to form ions with a different charge. Protons are not generally lost by atoms in chemical reactions.
How many electrons will selenium lose or gain in forming an ion?
Selenium may lose 2, 4 or 6 electrons and may gain 2 electrons.
Does astatine lose or gain electrons?
Gain of one electron
What type of elements gain and loose electrons as they form bonds?
Metals lose electrons, nonmetals gain electrons.
