PLZ HELP ITS FOR A TEST PERIODIC TABLE

What are the rows called?

What is the octet rule?

What are the columns called?

Why do atoms bond

1-The elements are arranged in seven horizontal rows, called periods or series, and 18 vertical columns, called groups

2-The octet rule states that atoms tend to form compounds in ways that give them eight valence electrons and thus the electron configuration of a noble gas. An exception to an octet of electrons is in the case of the first noble gas, helium, which only has two valence electrons.

3-Groups

4-A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

it takes on an electronical energy