1- El helio (He) es un gas valioso que se Utiliza en la industria, en las investigaciones donde
Se requieren bajas Temperaturas, en los tanques para
buceo profundo, y para inflar globos. ¿Cuantos
moles de He hay en 6.46 g de He?

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

hope this contact me for more questions if you'd like: )