Un átomo que contiene 12 electrones, 12 protones y 14 neutrones, tiene un número másico igual a A)12
B)24
C)26
D)38

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

може ли да зареждате повече информация, моля