elements of group 17 (most readily) followed by group 16 and group 15
Group 16 elements.
Group-17 in the periodic table gains electron most readily. The elements in this group require only one electron to complete its octet.
Since Selenium is a Chalcogen (meaning it's in group 6A on the Periodic Table), it gains 2 electrons to form an ion with a charge of -2.
Its by electrons.
Periodic table lists the elements in the increasing order of atomic number. Atomic number = Number of protons = Number of electrons
Group 13 has an oxidation number of 3+ so it is more likely to lose electrons than gain them, but it is possible that it gains them
Atoms that tend to gain electrons are located on the far left side of the periodic table.
Calcium has 20 electrons
period 3 elements in the periodic table have 3 electrons in there outher shell hence the name.
all the members of 3rd A group of periodic table have 3 electrons in outermost shell they are B ,Al, Ga, Tl and In.
8 electrons.
Metals give electrons.