General, Organic, and Biological Chemistry

A correlation exist between the periods of the periodic table and energy levels....... - correct answearsElements in period 1 have valence electrons in energy level 1 Elements in period 2 have valence electrons in energy level 2 and so on Accuracy - correct answearsHow close a measured value is to a true value Accuracy vs Precision - correct answearsAccurate: how close a measure value is to the true value Precise: a measure of reproducibility Actinide elements - correct answearsthe elements with an atomic number of 89-103 Adequate Intake (AI) - correct answearsThe daily intake of a nutrient believed to be sufficient to meet the needs of people *Used when an RDA is not available alkali metals - correct answearsgroup 1A metals Alkaline earth metals - correct answearsgroup 2A Alpha particle - correct answears⁴₂α a from of nuclear radiation that consists of two neutrons and two protons Identical to the nucleus of a helium-4 atom (⁴₂He) and 2+ charge BUT it has a much greater energy due to its high speeds (5-10% the speed of light) When an AP is emitted from an atom, the new atom formed has two fewer protons and two fewer neutrons Amount of energy to change phases of matter - correct answears*It takes same amount of energy to go from solid to liquid as it does to go from liquid to gas *the amount of energy from gas to solid = the the combined amount of energy of solid to liquid and liquid to gas Anions - correct answears