What did the biologist wear on his first date ?

Which of the following elements is in the same period as phosphorus? a. carbon c. nitrogen b. magnesium d. oxygen select the best answer from the choices provided a b c d

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion