In science class, you listen to the sound of a tuning fork after it is hit against a cork. When you place the tuning fork to one
end of a piece of wood and your ear to the other, you notice
that the sound becomes high pitched. What happened to the
sound waves as they went through the wood?
A. They slowed, due to a high pitch echo
B. They slowed, due to more matter in the wood
C. They sped up, creating a higher frequency
D. They sped up, creating a higher wavelength

answer; ///i do believe that the correct answer is (b); ///particle composed of two or more atoms bonded together;

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.