If an atom gains two electrons in a chemical reaction, what is its charge?

a

Question 4 options:

-2

-1

+2

+1

When the moon is near the horizon, it appears larger than when it is high in the sky. this effect is primarily a result of?

A skydiver is falling vertically downward toward the earth with a constant velocity. What can we conclude from this? O His velocity is 9.8 m/s downward. The net force on him is equal to his weight.

Explain how the theory of the Sun's dynamo results in an average 22-year solar activity cycle. Include the location and mechanism for the dynamo.

Desde lo alto de un edificio de 25 m de altura se lanza una pelota verticalmente hacia arriba con una velocidad de 10 m/s. Calcula: a) La altura máxima conseguida por la pelota. b) El tiempo que tardará en caer la pelota al suelo.

What conditions are required for nuclear fusion that prevent it from being used to generate electric energy?

How far away is a cliff if an echo is heard 0.486 s after the original sound? Assume that sound traveled at 343 m/s on that day.

Rafael swings a baseball bat with a force of 25 N. The baseball bat exerts a force of 5 N on the baseball. What is the mechanical advantage of the baseball bat? The mechanical advantage of the baseball bat is

Minerals such as sulfur can sometimes be identified by colors, true or false.

How does the number of each type of particle in a sodium ion compare with the number of each type of particle in a sodium atom?

Calculate the work done when a 10 N force pushes against a cart 4.0 m