There are about 200 different types<span> of cells in the human body. </span>
Answer:
Ne-21
Explanation:
the 21 represents the mass number. since neon has 10 protons, the mass number is calculated by adding the number of neutrons to 10.
this is because mass number = protons + electrons
so 10 +11 =21
C. Test the hypothesis with an experiment because her survey was an experiment to prove/disprove her hypothesis
The Answer Is A. Hope This Helps ;P
