Answer:
Un elemento químico es un tipo de materia constituida por átomos de la misma clase. En su forma más simple, posee un número determinado de protones en su núcleo haciéndolo pertenecer a una categoría única clasificada por su número atómico, aun cuando este pueda desplegar distintas masas atómicas.
Explanation:
I did this in my class a year ago and as far as i remember it was in the 1700 but i think 1767 to be exact
<span>Kepler’s harmonic law is the
third law of the Planetary Motion. He discovered this after ten years that
there is a relation between the time of a planet’s orbit and its distance from
the sun. The harmonic law states that <u>the squares of the orbital periods of
the planets around the Sun are proportional to the cubes of the planet’s orbital
period</u>. <u> </u> </span>
ATP or adenosine tri phosphate is the cell's main source of energy. It is hydrolyzed by the cell and the energy released is used in cellular activities like muscle movement
Answer:
I think its b but I'm not sure
don't hate me if I'm wrong