If element x has 36 protons, how many electrons does it have?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

As you watch a surfer ride a wave towards the shoreline, what is the shoreline? a) displacement reference b) reference point c) coordinate plane d) cartesian boundary