If you search the question text (starting with "Write") you will definitely find the answer
Answer:
its atomic number is 92 and its atomic mass is 238(92+146).
Explanation:
For example,Silicon has 14 protons and 14 neutrons.its atomic number is 14 and its atomic mass is 28
Explanation:
im not sure all I know is 1.81 x 1024
Answer:
B
Explanation:
elements in the same group are most similiar