Ms. mayo challenged her students to build a pendulum that would hit a block of wood and make it travel the farthest distance. the group that moved the block of wood the most would win a prize. one group's experimental data is shown above. what comment would you make about the group's manipulated variable?

c is the answer because when something is left after something evaporates that shows the chemical change.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

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.