10 points and brainliest!
word bank:
acid, atomic number, base, buffer, chemical bond, chemical reaction, crystalline, ionic bond, matter, neutron, polar molecule, radioactive

the number of protons in the nucleus of the atom is called the

The image shows ekgs of a person with normal heart waves and of a person having tachycardia. based on this image, what kind of condition is tachycardia? a. the heart beats abnormally fast. b. the heart beats abnormally slow. c. the right atrium of the heart stops working. d. the left ventricle pumps less blood to the aorta.

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.