I guess the answer your looking for very much depends on your hypothesis. A controlled experiment is <span>experiment where a scientist (you/observer) tests their hypothesis by looking for changes occuring due to changing the variable. For example if you were testing to find the best soil to grow tomatoes, you'd keep everything the same but you'd be changing the type soil. </span>
Answer: negatively; electron.
In a chemical bond, proton and neutron didn't take action since they are located in the middle(nucleus) of the atom. The electron which on the outer side of an atom can interact with another electron from an other atom/molecule. Electron has negative charge, while proton is positive and neutron is neutral.
Answer:
a. 5
Explanation:
When you have the number of protons, that will always be the atomic number
Enzymes speed up chemical reactions by lowering the activation energy.
Answer:
The answer is most likely enzymes that clot blood