Number 1, 2 and 3 all say in the blank Increase, Decrease or stay the same, the one I am hovering over is the only different one. If that doesn't make sense u can tell me​

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

sure im new too!

explanation:

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.