MTTC Integrated Sciences 094 Physical Sciences Actual Exam With Verified Solutions

MTTC Integrated Sciences 094 Physical Sciences Actual Exam With Verified Solutions Plasma - CORRECT ANSWER-ionized gas that has some electrons that are described as free because they are not bound to an atom or molecule specific gravity - CORRECT ANSWER-measurement of the density of substances in a liquid compared to water atomic theory - CORRECT ANSWER-a theory that states that all matter is composed of tiny particles called atoms. John Dalton - CORRECT ANSWER-developed modern atomic theory negative ion - CORRECT ANSWER-anion, gains electrons positive ion - CORRECT ANSWER-cation; loses electrons ionic bond - CORRECT ANSWER-Formed when one or more electrons are transferred from one atom to another Ionization - CORRECT ANSWER-neutral molecules gain or lose electrons valence electrons - CORRECT ANSWER-Electrons on the outermost energy level of an atom covalent bond - CORRECT ANSWER-A chemical bond that involves sharing a pair of electrons between atoms in a molecule hydrogen bond - CORRECT ANSWER-weak attraction between a hydrogen atom and another atom Van der Waals interactions - CORRECT ANSWER-Weak attractions between molecules or parts of molecules that result from transient local partial charges. 2 most abundant elements in the universe - CORRECT ANSWER-hydrogen and helium isotope - CORRECT ANSWER-An atom with the same number of protons and a different number of neutrons from other atoms of the same element. combustion reaction - CORRECT ANSWER-the oxidation reaction of an organic compound, in which heat is released; exothermic power - CORRECT ANSWER-the rate at which work is done work - CORRECT ANSWER-quantity of energy transferred by a force when it is applied to a body and causes that body to move in the direction of the force atomic radius - CORRECT ANSWER-average distance between the nucleus and the outermost electron Proton - CORRECT ANSWER-determines the atomic number; protons minus electrons indicates the charge Neutrons - CORRECT ANSWER-uncharged particles in the nucleus atomic mass - CORRECT ANSWER-Number of protons and neutrons atomic weight - CORRECT ANSWER-ratio of the average mass per atom of a sample Democritus - CORRECT ANSWER-Greek philosopher that said all matter is made of tiny particles called "atomos" or atoms JJ Thomson - CORRECT ANSWER-Plum pudding model Ernest Rutherford - CORRECT ANSWER-1909-solar system model of the atom, gold foil experiment- fired negative ions at thin sheet of gold foil, discovered the atomic nucleus and proposed a nuclear model of the atom . Niels Bohr - CORRECT ANSWER-orbit model Louis de Broglie and erwin schrodigner - CORRECT ANSWER-electron cloud model Radioisotopes - CORRECT ANSWER-Isotopes that have unstable nuclei due to excess energy or undergo radioactive decay. radioactive decay - CORRECT ANSWER-A spontaneous process in which unstable nuclei lose energy by emitting radiation radioactive half-life - CORRECT ANSWER-the time it takes for half of the radioactive isotopes in a sample to deca