(PLEASE HELP) Which of the following describes an element?

A. Matter made up of only one type of atom
B. A substance made of two or more types of atoms
C. Two or more types of atoms chemically bonded together
D. Two or more types of atoms that are not chemically bonded

260 miles per hour

explanation:

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2