Potassium would lose electrons in all its reactions especially with Bromine.
Bromine must gain one electron
Boron can lose 3 electrons from its valence shell that is 2 in 2s & 1 in 2p sub-shell, wheras it cannot gain electron b'coz of its electropositive nature & it has less electron affinity.
The electro negativity of O is higher. So Beryllium loses 2 electrons.
Potassium is more likely to lose its electron to become a positive ion.
Bromine, being in the second column from the rigth of the periodic table has a high electronegativity so when it forms compounds it tends to gain electrons, in other words, it is a nonmetal. While metals, which have low electronegativities tend to lose electrons
Bromine must gain one electron
It'll have to gain one to have a stable octet.
it gains electrons.
Bromine will gain one electron.
Bromine will gain one electron to become Br-
Bromine gain one electron and become Br-.
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Electrons lose in case of potassium. It looses 1 electron.
When a bromine atom reacts with a metal, it tends to gain an electron from the metal.
Boron can lose 3 electrons from its valence shell that is 2 in 2s & 1 in 2p sub-shell, wheras it cannot gain electron b'coz of its electropositive nature & it has less electron affinity.
The electro negativity of O is higher. So Beryllium loses 2 electrons.