They run from left to right
Periods in the periodic table tell you the number of electron shells an element has. As you move across a period from left to right, the number of protons, electrons, and valence electrons increases by one, resulting in elements with similar chemical properties being grouped together.
Read the explanations under your periodic table; not all periodic tables have colors.
The periodic table was originally invented in 1958 when B. Cosby decided that he didn't need a table in his kitchen all the time. Dr. Cosby originally put claw feet on the table, and named the table for the the comma like shape of the feet. But the name he chose, the comic table did not catch on as potential buyers expected the table to be funny and tell jokes. The name was changed to periodic table shortly thereafter in the spring of 1960 to reflect the fact that many women bought this table in an act of shopping-madness induced by their menses. This little known fact was obscured by a popular rumor that the divots carved about the edges of the table were actually punctuation marks and hence the name. Today periodic table is recovering from alcoholism and is undergoing treatment at the Betty Ford clinic.
By number of elctrons,protons in them and their reaction rate
A group is a horizontal row(going across from left to right) on the periodic table. A period is a vertical column(going up and down). Both are used to give information about an element. In particular, together, they can indicate the number and orbital location of the element's valence electrons (for all but the transition metals).
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Periods in the periodic table tell you the number of electron shells an element has. As you move across a period from left to right, the number of protons, electrons, and valence electrons increases by one, resulting in elements with similar chemical properties being grouped together.
The periodic table tells you chemical elements. :)
Elements in the same period has same number of valence shells.There are 7 periods in Periodic Table.
It is arranged such that similar elements with similar preferred bonding arrangements are aligned vertically. This exposes the various s, p, d, and f bonding orbitals for each successive "exterior" shell, and so appears to repeat... hence "periodic".
The periodic table can tell you the atomic number, atomic symbol, and atomic mass of each element listed. It also provides information on an element's properties, such as its reactivity and basic chemical behavior. Additionally, the periodic table organizes elements into groups and periods based on their similar chemical properties and electron configurations.
The rows (periods) work out to be the energy levels, ex. if an element is in period 5, it has 5 energy levels.
the benefit is that you can tell the atomic number atomic mass its symbol and where it is on the periodic table
where tell me then
Groups, 1 through to 8 (or 0) The internet will tell you details about the individual groups. P.S. The rows are called periods
The Periodic Table tells you how many protons are in an atom by their Elemental Number. In other words, yes, the Periodic Table tells you how many protons are in an atom.
Atomic weight