Science students in high school and colleges often find it a bit difficult to memorize the first 20 elements of the periodic table and this has posed some challenge in school especially during examinations or some kind of academic work that involves the use of any of the 20 elements of the periodic table either in determining their atomic number, mass number or reactivity.
These first 20 elements of the periodic table run across all the 8 groups in the table starting from the group on element down to the group eight elements or what is generally known as the inert gases or rare gases.
It is very pertinent that every science student at least at the ordinary level stage understand how the elements in the periodic table are groped and arranged in periods and groups and what properties inform the groupings of these elements. I have since learnt that importance of the first 20 elements in scientific study and exploits and have devised a methodology of memorizing these first 20 elements without must task to my brain power!
You too can easily memorize these first 20 elements of the periodic table by just reeling out this poem whose words are subtle reminders of the first letters of the first 20 elements.
Now here we go…
He(H) has(He) light(Li) brain(Be) but(Bo) could(C) not(N) offer(O) full(Fl) nine(Ne) subjects(Sodium, NA). Many(Mg) art(Al) students(S) pose(P) some(Si) complain(Cl) about(Ar) passing(potassium, K) chemistry(Ca)
So from the poem above, The first 20 elements of the periodic table are: