Chapt 2 Bio 101 Exam 1 NVCC Questions With Verified Solutions

Chapt 2 Bio 101 Exam 1 NVCC Questions With Verified Solutions Matter - answerAnything that has mass and takes up space Element - answerA pure substance made of only one kind of atom bulk elements - answeran element that an organism requires in large amounts elements making up life - answer1. Hydrogen 2. Oxygen 3. Carbon 4. Nitrogen 5. Phosphorus 6. Sulphur Minerals - answerElements found in food that are used by the body trace elements - answerrequired by an organism in only minute quantities Atom - answerSmallest particle of an element Proton - answerA subatomic particle that has a positive charge and that is found in the nucleus of an atom Nuetron - answerA subatomic particle that has no charge and that is found in the nucleus of an atom Nucleus - answerControl center of the cell Electron - answerA subatomic particle that has a negative charge atomic number - answerthe number of protons in the nucleus of an atom Ion - answerA charged atom mass number - answerthe sum of the number of neutrons and protons in an atomic nucleus Isotope - answerAtoms of the same element that have different numbers of neutrons atomic mass - answerThe average mass of all the isotopes of an element radioactive - answerA spontaneous process in which unstable nuclei lose energy by emitting radiation Molecule - answerA group of atoms bonded together Compound - answerA substance made up of atoms of two or more different elements joined by chemical bonds Orbital - answereye energy shells - answerRepresent the state of potential energy of an electron. Those closer to the nucleus have the least amount of energy. valence shell - answeroutermost electron shell chemical bond - answerthe force that holds two atoms together covalent bond - answerA chemical bond that involves sharing a pair of electrons between atoms in a molecule Electronegativity - answerA measure of the ability of an atom in a chemical compound to attract electrons nonpolar covalent bond - answera covalent bond in which the electrons are shared equally by the two atoms polar covalent bond - answerA covalent bond in which electrons are not shared equally ionic bond - answerFormed when one or more electrons are transferred from one atom to another hydrogen bond - answerweak attraction between a hydrogen atom and another atom Cohesion - answerAttraction between molecul