Answer:
potassium
Explanation:
i know its very reactive, so much so it can't be found openly in nature, so i believe potassium is the most reactive in period 4
This is kinetic energy to heat energy
Can you define the question further.
This may help with your answer:
Tricuspid valve. This valve is located between the right atrium and the right ventricle.
Pulmonary valve. The pulmonary valve is located between the right ventricle and the pulmonary artery.
Mitral valve. This valve is located between the left atrium and the left ventricle. It has only 2 leaflets.
Aortic valve. The aortic valve is located between the left ventricle and the aorta
