How do elements change as you move to the right along a row in the periodic table? (2 points) The atomic number decreases.
The electronegativity decreases.
The average atomic mass increases.
The number of valence electrons decreases.

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

The energy produced as a result of this flow of electrons from atom to atom is called