The periods near the top, i presume because they have less shielding from other electrons in their orbitals, therefore there will be a larger nuclear pull so easier to attract electrons. Obviously a element with a full shell or 1 or 2 electrons in it isn't really going to gain electrons and Transition metals are weird.
Hope this helps :)
learn electron affinity rather than ask on wikianswers. it isn't that hard
The elements that have the greatest tendency to attract electrons to themselves are the halogens, or Group 17 elements.
chlorine
Electrons
An element that has two outer electrons is carbon. Carbon would not use the energy to gain six more electrons when it can easily get rid of the two outer electrons.
Beryllium would tend to lose its two electrons when forming a bond because it is easier to lose its two valence electrons rather than gain an additional five in order to obtain a full outer shell.
An electron or electrons is/are lost or gained to produce an ion. An atom with the same number of electrons as protons is a neutral atom. If the proton count and electron count do not match, that atom is electrically "imbalanced" and is an ion.
An element's number of protons can predict whether it will form a cation or anion. It will form a cation if it has more protons than electrons, or an anion if there are more electrons than protons.
Fluorine require only one electron to fill its outer shell. Hence it has the greatest tendency to gain electrons than Al, Rb and I.
Increases on moving left to right
as you move across a period, you are more and more likely to gain electrons
No. Nonmetals generally gain electrons during chemical reactions.
metals have a tendency to lose electrons while nonmetals have a tendency to gain electrons. Metals are located left of the stair-step line and non-metals are located to its right.
You wouldn't expect strontium to gain electrons in a chemical change.
Gold will lose electrons because it has two valence electrons in the S orbital
The tendency to lose electron decreases along a period. The tendency to gain electron increases.
it is a noble gas, it doesn't do either one
All non-metals have either 5, 6 or 7 electrons in their octet which makes them suitable to gain electrons to achieve stability. Hence it is difficult for electrons to lose electrons.
There are two reasons for that. Non metals do not have octet of electrons on their valence shell. Addition of electrons help them satisfy octet tule. Non metals have high electron affinity and hence high tendency to gain electrons.
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