HESI (Entrance Exam) Questions with Verified Solutions 2024

HESI (Entrance Exam) Questions with Verified Solutions 2024 What are the most abundant elements of the human body? - Answer -Carbon, Hydrogen, Oxygen, Nitrogen 90% of the human body is composed of just four elements which are: - Answer -Carbon, Hydrogen, Oxygen, Nitrogen The smallest unit of an element that still retains the chemical and physical properties of the element is called: - Answer -Atom Subatomic particles are: - Answer -Protons (positive), Neutrons (neutral) and Electrons (negative) All matter is composed of basic substances called - Answer -Elements An atom that tells you how many protons an atom has is called: - Answer -Atomic Number The number of protons and neutrons is called: - Answer -Mass Number 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. What is radioactive isotope? - Answer -Atom whose nucleus undergoes degeneration and in the process gives off radiation What is a molecule? - Answer -Atoms bonded together to form a chemical unit What is a compound? - Answer -Combining different atoms What is ionic bond? - Answer -Ions with opposite charges attract What are ions? - Answer -Particle that is electrically charged because it has gained or lost one or more eletrons What is a covalent bonds? - Answer -Atoms sharing electrons instead of losing or gain them What is polar bond? - Answer -Bond created when electrons shared by adjacent atoms are shared unequally hydrophilic means - Answer -water-living Hydrophobic means - Answer -water-fearingWhat is electrolyte? - Answer -Substances that release ions when puts into water What is pH? - Answer -a measure of hydrogen ion concentration Anterior position - Answer -a body part is located towards the front (ventral) Posterior position - Answer -a body part is located toward the back. (dorsal) Superior position - Answer -a body part is located ABOVE another part or towards the hea