La frecuencia de una onda se duplica cuando la longitud de onda permanece igual. ¿Qué sucede con la velocidad de la onda? help me plsss

iron and sleel

make siroeel

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

the answer is d.) potassium