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You have reached 0 of 0 points, (0) Compared to the charge of a proton, the charge of all electron has protons are 1+ and electrons are 1- protons are 1+ and electrons are 1- Which atom has the largest atomic radius? Reference Table S. Look up each element. Reference Table S. Look up each element. In the wave-mechanical model of the atom, an orbital is defined as electrons are located in the cloud, they travel in waves electrons are located in the cloud, they travel in waves When an excited electron in an atom moves to the ground state, the electron excited electrons fall giving off energy excited electrons fall giving off energy Which polyatomic ion is found in the compound represented by the formula NaHCO3? Table E HCO3– is hydrogen carbonate Table E HCO3– is hydrogen carbonate The atomic mass of magnesium is the weighted average of the atomic masses of Definition of atomic mass Definition of atomic mass Which element has atoms that can form halide ions? Group 17 are the halogens Halogens gain an electron and form halide ions Group 17 are the halogens Halogens gain an electron and form halide ions Two forms of solid carbon, diamond and graphite, differ in their physical properties due to the differences in their Allotropes are different forms of the same element. They have different structures and therefore different properties. Allotropes are different forms of the same element. They have different structures and therefore different properties. Which quantity can be calculated for a solid compound, given only the formula of the compound and the Periodic Table of the Elements? Given a formula, the mass of the part and whole formula can give you the percent mass of each element in a compound. Given a formula, the mass of the part and whole formula can give you the percent mass of each element in a compound. Which terms identify types of chemical reactions? Phase changes are not chemical reactions. Phase changes are not chemical reactions.6.2014.1-10
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You have reached 0 of 0 points, (0) The greatest amount of energy released per gram of reactants occurs during a nuclear reactions produce more energy than conventional reactions E=mc2 nuclear reactions produce more energy than conventional reactions E=mc2 Which element has atoms with the strongest attraction for electrons in a chemical bond? Definition of electronegativity. Reference Table S. Definition of electronegativity. Reference Table S. Compared to the physical and chemical properties of the compound NO2 the compound N2O has NO2 and N2O are different compounds and there for have different physical and chemical properties. Which phrase describes a molecule of CH4, in terms of molecular polarity and distribution of charge? CH4 is non-polar and symmetrical. Which sample of copper has atoms with the lowest average kinetic energy? Lowest average kinetic energy is the lowest temperature. Lowest average kinetic energy is the lowest temperature. Which change results in the formation of different substances? Phase changes do not produce different substance(s). Chemical reactions produce different substance(s). Phase changes do not produce different substance(s). Chemical reactions produce different substance(s). Which substance can not be broken down by a chemical change? Definition of an element. Definition of an element.6.14.11-20
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In the June 2014 Chemistry a (51/85)100 = 60% on the raw score equates to a 65% scaled score – what you will receive on the exam.
To score an 85% a student needs to get 75 out of 85 question, which equates (75/85)100 which calculates to 88% on the raw test.
Final reminder in order to score 85% in the scale score you will need to score 88% on the actual test – raw score.