Describe why the elements in the periodic table are arranged in order of increasing atomic number.?

Answer 1

If you put the elements in order by atomic number (i.e., the number of protons and electrons in the atom), and if you vary the number of elements in the rows of the table, then each column in the table contains elements with similar qualities (e.g., the noble gases on the far right, the halogens just to the left of the noble gases, and the group 1 metals on the far left).

Pitambri says that 8 electrons make a noble gas. But 8 electrons would describe oxygen, which is very reactive. What he means is 8 electrons IN THE OUTER SHELL. And even at that, it's true only in the second and third rows (Neon and Argon). After that, the number of electrons in the outer shell increases. (And in the first row, helium has only 2 electrons in the outer shell.)

Answer 2

You can put elements in any order you like. The periodic table was designed for chemists and scientists. The layout is used because of the similarity of chemical reactions and behavior.
The atomic weight may vary for an element because the neutrons (isotopes?), but the number is always the same for an element.

Answer 3

So we can remember the elements. Element with 8 electrons is inert. So the elements in each colum are similar in properties.

Answer 4

Becauise it extremely is the sole thank you to orginize each and all of the elemnts right into a usable chart. Scientests tried for years to orginize the climate, yet till adequate factors have been got here across, they could no longer placed the puzzle mutually. i think of Mandaleev first controlled to orginize the chart in any such way that it became usable.