Answer:
The answers are as given in the attachment
Explanation:
The application of the de brogile equation was used and appropriate substitution were made as shown in the attachment
The Earth spins on its axis and revolves around the Sun. The tilt of its axis with respect to the Sun causes the Earth's seasons. The Earth also follows the Sun's rotation around the center of the Milky Way galaxy, which is moving through space.
C. Silicon
EXPLANATION
Silicon is the second most common element present in the crust with an abundance of 276,900 ppm or equivalent to 27.7%. The most abundant element is oxygen with 46.6%.
