Answer:
Electronegativity decrease in group from top to bottom
Explanation:
I did this before and i had got an A no it but its been along time tho
The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.
You're right it's the oceans.. since most is salt water, the salt has to be boiled out