When chlorine gas, Cl, is put into a gas jar, it spreads out to fill the gas jar. When bromine gas, Bry, is put into a gas jar, it also spreads out to fill the gas jar.
The process takes longer for bromine gas than for chlorine gas,
gas jar
gas
start
later
(a) What term describes the way that the gas particles spread out?
(1)
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12 is it do you think so

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.

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.