HESI EXAM COMPREHENSIVE EXIT EXAM RETAKE 2024/2025..

An atom that tells you how many protons an atom has is called: - -answer-Atomic Number 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 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 the most abundant elements of the human body? - -answer-Carbon, Hydrogen, Oxygen, Nitrogen