Number 4 I think
the atomic mass is 11 because the mass is the sum of protons and neutrons
The reading on the scale is greater than your actual weight.
Ionic compounds is your answer. What happens is one atom donates electron(s) to the other atom, making one positive and the other negative. The opposite atoms attract, forming an ionic bond.
Hope this helps! :)
Respiratory system.
Oversimplified Explanation: they enter the lungs, which is part of the respiratory system.
Answer:
it tells you that the speed increases until about 20 seconds then keeps a steady pace for 20 seconds then the speed drops and stops at 55 seconds in the process.
