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oxygen
[well you would show the 2 diffrent particle (oxygen and magnesium) with 1 magnesium particle and 2 oxygen ones attached to it . this is known as MgO2] i believe it is MgO as the electron number is too big to support 2 molecules of oxygen
The second electron gain of an oxygen atom would be expected to be less negative. The reason for this outcome is that the oxygen atom gaining a second electron already has one electron and thus a negative charge. This negative charge repels the second electron to some extent, making the enthalpy of this process less negative than when the first electron was added to the neutral oxygen atom.
Krypton has a full outer shell of eight electrons, so it would be eight dots, either around the outer circle if you're doing a full circle diagram, or just two dots above, below, to the left, and to the right of the Kr.
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The water molecule has a 4 electron group, as the oxygen has two lone pairs. The two lone pairs are going to repulse the hydrogen atoms creating a bent shape for the water molecule.
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oxygen
[well you would show the 2 diffrent particle (oxygen and magnesium) with 1 magnesium particle and 2 oxygen ones attached to it . this is known as MgO2] i believe it is MgO as the electron number is too big to support 2 molecules of oxygen
The electron configuration of 1s22s22p3s1 is not the ground state electron configuration of any element. This configuration contains 8 electrons, which in the ground state would be oxygen. The ground state configuration of oxygen is 1s22s22p4.
The second electron gain of an oxygen atom would be expected to be less negative. The reason for this outcome is that the oxygen atom gaining a second electron already has one electron and thus a negative charge. This negative charge repels the second electron to some extent, making the enthalpy of this process less negative than when the first electron was added to the neutral oxygen atom.
Oxygen will gain two electrons to achieve a full outer shell.
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