HESI Biology Exam Guides 2023 Guaranteed A+ Actual Questions and Answers, Complete 100%

HESI Biology Exam Guides 2023 Guaranteed A+ Actual Questions and Answers, Complete 100% 1. What are the most abundant elements of the human body?: Answer: Carbon, Hydrogen, Oxygen, Nitrogen 2. 90% of the human body is composed of just four elements which are:: Answer: Carbon, Hydrogen, Oxygen, Nitrogen 3. The smallest unit of an element that still retains the chemical and physical properties of the element is called:: Answer: Atom 4. Subatomic particles are:: Answer: Protons (positive), Neutrons (neutral) and Electrons (negative) 5. All matter is composed of basic substances called: Answer: Elements 6. An atom that tells you how many protons an atom has is called:: Answer: Atomic Number 7. The number of protons and neutrons is called:: Answer: Mass Number