how do you know how many energy shells are on an element?

Question

please help me. My homework is due monday.

for examlpe Ne

example neon

Answer 1

"Loz R" got it backwards. Groups (or families) are vertical; series (or periods) are horizontal.

The number of energy shells is equal to the principal quantum number, which is also equal to the series the element is in. Neon is in the second series, thus it has two energy shells. [1s2 2s2 2p6 = Ne]. The highest principle quantum number is 2. That's how many shells you got. Note: the s and p orbitals (sometimes called "suborbitals") are actually describing the "shape" of the electron probability cloud. "s" is a spherical cloud; "p" is a dumb bell shaped cloud, located across the 3 different axis (x,y, and z axis).

Answer 2

By the row in the periodic table.

First row = 1 energy shell
Second row = 2 energy shells
etc.

Answer 3

This is easy!
look at your periodic table. To know how many shells there are for an element. You gotta 1st know what is groups and what is periods.

Groups - going across the periodic table
e.g: from Lithium to Neon

Period - going from top to bottom of the periodic table
e.g: Hydrogen to Francium

now.. to know how many shells they have... follow the period no.
e.g: Hydrogen is in the 1st period, therefore it has one shell. Potassium is in period 4 that means it has 4 shells.

Answer 4

Check your Periodic Table. Each row represents a shell. (Careful--for the heavier elements it's necessary to "fold' the rows to display them , dependent on the physical width of the chart.

Answer 5

Yes, it is by row.
i.e., Ne = 2nd row, 2 shells
Ar = 3rd row, 3 shells, etc

Answer 6

dont u ppl ever listen in class????or remember that u have textbooks to read from???
u have time enough to come online but not enough to go through a book for ten mins???
geez.........

Answer 7

Read your book...this is not a place for free answers....