HESI > HESI > 2024 HESI Biology Exam Guides Guaranteed A+ Actual Questions and Answers, Complete 100% (All)

2024 HESI Biology Exam Guides Guaranteed A+ Actual Questions and Answers, Complete 100%

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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, Hydrog... en, 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 8. What is isotope?: Answer: The same element but different number in protons and neutrons-Mass Number (protons plus neutrons) minus Atomic Number (number of protons) equals the number of neutrons. 9. What is radioactive isotope?: Answer: Atom whose nucleus undergoes degeneration and in the process gives off radiation 10. What is a molecule?: Answer: Atoms bonded together to form a chemical unit 11. What is a compound?: Answer: Combining different atoms 12. What is ionic bond?: Answer: Ions with opposite charges attract 13. What are ions?: Answer: Particle that is electrically charged because it has gained or lost one or more eletrons 14. What is a covalent bonds?: Answer: Atoms sharing electrons instead of losing or gain them [Show More]

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