Who is given credit for recognizing that elements are the basic building blocks of matter? a. john dalton b. dmitri mendeleev c. niels bohr d. charles darwin

John Dalton is an English chemist and physicist, who proposed the modern atomic theory. The modern atomic theory states that all matter was composed of atoms, indivisible and indestructible building blocks. So, John Dalton is given credit for recognizing that elements are the basic building blocks of matter. Solution: A

Answer: fn = wcos50 = 38.89(9.81)(cos50) = 245.23 n