Holes Human Anatomy & Physiology- CH. 2 Exam with Correct Solutions 2024

Holes Human Anatomy & Physiology- CH. 2 Exam with Correct Solutions 2024 Define Chemistry - Answer -Chemistry considers the composition of substances and how they change. Explain the difference between chemistry and biochemistry - Answer -Chemistry is the study of composition and substance and how they change Biochemistry is the chemistry of living organisms Define matter - Answer -Anything that has weight and takes up space Define compound - Answer -Product of two or more elements being combined List the four most abundant elements in the human body - Answer -Hydrogen Oxygen Carbon Nitrogen Explain the relationship between elements and atoms. - Answer -Element is a basic substance that other things are composed from each made up of atoms. Atom is smallest unit of an element. Identify the major parts of an atom and where they are found within an atom. - Answer -Each atom is composed of a central portion called a nucleus and one or more electrons are in constant motion around the nucleus. It contains one or more large particles called protons and contain one or more similarly sized particles called neutrons. Distinguish between protons and neutrons - Answer -Protons are single positive electrical charges Neutrons are uncharged and electrically neutral Explain why a complete atom is electrically neutral - Answer -Electron carries single negative electrical charge and proton carries single positive charge. Neutron carry no charge making them neutral. Atom is electrically neutral they are same number as proton/electron which cancel each other out. Distinguish between atomic number and atomic weight - Answer -Atomic Number is # of protons in atom of an element Atomic weight is # of protons plus the # of neutrons in atom of an element. Define Isotope - Answer -Elements with the same atomic number but different atomic weights