I can't understand your option because there is no full stop however
isotopes are 2 or more form of elements that contain equal number of proton but different number of neutron in their nuclei
Answer:
By contracting, muscles pull on bones and allow the body to move. ... For example, the biceps and triceps muscles work together to allow you to bend and straighten your elbow. When you want to bend your elbow, your biceps muscle contracts (Figure below), and, at the same time, the triceps muscle relaxes.
Explanation:
36.49 gm using law of equivalent proportion
Here you are! I hope it helps, and also for the ones I put a red ‘x’ it depends on how you round it.