El átomo de un elemento incógnita X tiene 2 electrones en n = 1; 8 electrones en n = 2; 8 electrones en n = 3 y 1 electrón en n = 4. Indicar para ese elemento: grupo, periodo, número de electrones y protones. Use la regla de las diagonales

i believe it is 40–40–20%

explanation:

d.) circle motion requires a force to give it a centripetal acceleration.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.