C is the correct answer
every element has its own atomic numbers(number of protons )it's as special as fingerprint
if the atomic number changes the element will change



_________________________________
If west means the west of the axis x the velocity equal :

Answer:
c
Explanation:
When a satellite is orbiting the earth , a constant force is being applied on it which means it must has acceleration. Also the direction of satellite is always being changed when it is orbitting to there is always change in the velocity vector which means acceleration.
You can view in the attached diagram to understand how the velocity is being changed.
Answer: im not sire
Explanation: very sorry im not sure
Explanation:
Below is an attachment containing the solution.