During alpha decay, a radioactive atom releases an alpha particle that is equivalent to the nucleus of a helium atom. So, the new atom that is formed should have protons than the original atom.
A.
two more
B.
two fewer
C.
four fewer
D.
four more

The earth remains in orbit around the sun due to the force of gravity. how does the force of gravity exerted by the sun on the earth compare to the force of gravity exerted by the earth on the sun?

In your own words, describe the purpose of using a chemical equation.

John's grandfather clock has a pendulum that keeps the seconds. the observed pattern of motion for three complete swings of the pendulum is shown. assuming that the pendulum starts at the right and moves toward the center first, predict the direction the pendulum will move next