You will work on this lab individually. You will write a CER using the rubric below. Your claim should address which metal between two is more reactive. Pick from one of the comparisons below. You need to talk to your table mates in
class and pick a different comparison that your table mates. All tables have no more than 6 people and there are 6
choices below. I will give you the first 5 minutes of class on Tuesday 1/11 to figure this out.
My elements are lithium and potassium

can you list the answers so i can answer

give me abc and i will get it for u.

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.