Two electrons
2 electrons
Ba gains noble gas configuration by losing 2 electrons. It gains the electron configuration of Xe.
Barium has to give up 2 electrons.
6 electrons (not elements)
2
Two electrons.
Two, as indicated by its presence in column 2 (or IIA) of a periodic table.
Losing an electron cesium has a noble gas configuration.
2 electrons as barium has 56 electrons so it will lose two electrons to reach the electronic structure of the nearest noble gas which is xenon 54 electrons
They achieve the electron configuration of a noble gas.
Iodine accepts one electron to achieve noble gas configuration. Strontium loses two electrons to achieve noble gas configuration. Nitrogen accepts three electrons to achieve noble gas configuration. Krypton already has a noble gas configuration.
Two electrons are donated by Barium to an oxidant (nonmetal, eg. O2) by which barium gets oxidised.Ba --> Ba2+ + 2e-This is because Ba is in group 2 of the periodic system, belonging to the 'earth alkali' metals and so it has 2 electrons (2e-) in its valency (or outer) shell (2,8,18,18,8,2). Hence Ba2+ configuration is (2,8,18,18,8,-), with an empty (-) 6th shell (the 'P' shell) like Xenon.
Selenium should gain two electrons and lose six electrons to achieve a noble gas electron configuration.
Chemical properties depend on electron configuration. By either gaining or losing electrons, an atom changes its electron configuration and therefore its chemical properties also change.The atoms of an element will react to achieve a noble-gas configuration. The atoms will either gain or lose electrons to achieve such a configuration.
Because by losing two electrons from the neutral atoms, a barium ion acquires a noble gas electron configuration.
Chlorine gains 1 electron to achieve the noble gas electron configuration of argon.
It must lose 1 electron