What does the period number tell us about an element?

Answer 1

The period tells us 3 things:

# As you go from left to right across each period, the number of protons in the nucleus increases # As you go from left to right across each period, the reactivity of each element decreases (E.g. Sodium is very reactive but argon is very stable as it is a noble gas) ∴ tells us about the reactivity # It tells us the number of shells there are for each element (E.g. Magnesium has 3 shells [2.8.2], ∴it is in the 3rd period)

Answer 2

For elements it's the atomic number not the "Period Number." This number tells you how many protons a single atom of that element has in its nucleus.

The "period number" is a dimensionless quantity used in fluid dynamics.

Answer 3

it just means that all of the elements in the periodall have the same energy levels.and how many energy levels there is gonna be.-----------------------------------------------------------------------------------------------------

The answer above is incorrect. A period number actually tells how many shells a atom has.

For example; Curium's period number is 7, so it has 7 shells.

btw, whoever answered this first, that's pretty bad you got outsmarted by a 8th grader!

Answer 4

the Periodic Table should tell you:

• atomic number
• atomic weight
• element symbol
• name of element

specifically, though, the period tells you the number of electron energy shells the elements in it have; for example, elements in the 2nd period (or row) have 2 energy shells.

Answer 5

The period number tells us the energy level or electron shell in which the element's valence electrons are located. Elements in the same period have the same number of electron shells but have different numbers of electrons in those shells.

Answer 6

The period number tells you how many shells a atom has.

Ex; Curium's period number is 7, so it has seven shells. :)

Answer 7

They tell you the outer electron configuration, and determines many chemical properties of the element