Radon!
electron configuration
It is in group 17.
the element belongs to 4th period, 9th group, it is a d block element. the element is cobalt
The electron configuration of sodium is: [Ne]3s1.
Technicium (Tc) can be found in period 5 group VII of the periodic table. It is a transition metal and so is a d-block element. Thus the electron configuration is [Kr]4d5 5s2
electron configuration
It is in group 17.
The period of an element is determined by electronic configuration.Period is same as the number of energy levels of the element.
hlkasnh iwhg
the element belongs to 4th period, 9th group, it is a d block element. the element is cobalt
Electron configuration is the arrangement of elements according to their increasing atomic numbers whiles period is the arrangement of elements according to the increasing number of valence electrons.
S [Ne] 3s2 3p4
Chlorine is the group 17, period 3 chemical element. Therefore, its electron configuration is 1s2 2s2 2p6 3s2 3p5. Another way to write this is [Ne] 3s2 3p5 since the beginning of the electron configuration is the same as neon's.
The inert gas in Period 2 is the element Neon(Ne). Its electron configuration is 2-8.
an element with 2 valence electrons can obtain a stable electron configuration by "kicking out" two electrons to have the same electron config as the noble gas in the previous period
The electron configuration of sodium is: [Ne]3s1.
Shouldn't you do the homework yourself. Teach your teacher!