+1
+1
Yes. A particle that loses an electron becomes an ion with a positive charge. A particle that gains an electron becomes an ion with a negative charge.
The charge of an ion is a result of the atom gaining or losing electrons. Determining this is the difference between the number of protons and the current number of electrons. For instance, an atom of potassium that has lost an electron would have a +1 charge.
Lithium does not have a '0' charge. Its electron configuration is 2,1. This means there is one valence electron in its outer shell. Losing this electron will make Lithium have a full shell (2 only) which all atoms try to achieve, therefore Li has a +1 charge because it loses an electron to gain noble gas configuration.
Alkali metals react by losing the single electron that is in their outer shell. For higher atomic numbers, that shell is farther from the positively-charged nucleus, so electric force on the electron is less. Atoms with higher atomic numbers also have more protons, so you might expect them to attract an electron with a stronger force, but the extra protons are balanced by extra electrons. The net charge attracting the electron is still the same as that of one proton. Less energy is required to separate the outer-shell electron from the atom and cause it to react.
+1
+1
+1
18
18
As it has more electron shells between the nucleus and the outermost electron, and as group 1 elements react by losing there outermost electron, the more shielding effect between the nucleus and the electron, the smaller the force of attraction on the electron, so the more readily it will react as less energy is needed to break the bond between the outer electron and the positive nucleus.
This atom become a cation (positive).
an negative charge occurs :)
Yes. A particle that loses an electron becomes an ion with a positive charge. A particle that gains an electron becomes an ion with a negative charge.
2+
That is exactly what a definition of an ion is. Ion's have charges. That's what they are. WHY? They lose or gain electrons. By GAINING an electron, you have a negative (-) charge. By LOSING an electron, you have a positive (+) charge.
Lithium does not have a '0' charge. Its electron configuration is 2,1. This means there is one valence electron in its outer shell. Losing this electron will make Lithium have a full shell (2 only) which all atoms try to achieve, therefore Li has a +1 charge because it loses an electron to gain noble gas configuration.