Why is cobalt (Co) placed before nickel (Ni) on the periodic table of the elements even though it
has a higher average atomic mass than nickel?
A Nickel has one more proton.

B Cobalt was discovered first.

C Nickel has fewer electrons.

D Cobalt has a lower density.

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

Atp, shorthand for adenosine triphosphate, is the standard molecule for cellular enger in the human body. all motion and metabolic  processes  within the body begins with energy that is released from  atp, as its phosphate bonds are broken in cells through a  process  called hydrolysis.