C.2.5 Compare and contrast Emphasis is on simple qualitative Nuclear reactions change in the energy or Energy and Matter – nuclear reactions with chemical models, such as pictures or diagrams, structure of an atomic nucleus (fission, reactions and on the scale of energy released in fusion, or radioactive decay) Stability and change nuclear processes relative to other kinds Chemical reactions process of – of transformations. rearrangement of the molecular or ionic structure of a substance (making or breaking chemical bonds), as opposed to change in physical form or a nuclear reaction C.2.6 Describe nuclear changes Emphasis is on simple qualitative Nuclear changes change in the number of Energy and matter – in matter, including fission, models, such as pictures or diagrams, protons or neutrons in the nucleus of an fusion, transmutations, and and on the scale of energy released in atom Stability and change decays. nuclear processes relative to other kinds Matter thing that has mass and takes up – of transformations. space Structure and function Fission splitting of a nucleus of an atom – into two nuclei of lighter atoms and the release of energy Fusion nuclei of light atoms join to form – nuclei of heavier atoms Transmutation the conversion of one – element or nucleide into another either naturally or artificially Decay nucleus of an unstable atom loses – energy by emitting radiation C.2.7 Perform half-life Perform sample calculations and Half-life the time it for half of a Patterns – calculations when the half-life to find time that has passed, radioactive sample to decay to a more stable appropriate information about original mass, final mass, and calculate isotope proportion, and the isotope. half-life based on experimental data. Isotope any of two or more species of quantity – atoms of a chemical element with the same atomic number and nearly identical chemical behavior but with differing atomic mass or mass number and different physical properties Standard 3: Bonding and Molecular Structure Indiana Academic Standard Clarifying Statement Highlighted Vocabulary from the Crosscutting Concept Standard Defined
C.2.5 Compare and contrast nuclear reactions with chemical reactions Emphasis is on simple qualitative models, such as pictures or diagrams, and on the scale of energy released in nuclear processes relative to other kinds of transformations. Nuclear reactions – change in the energy or structure of an atomic nucleus (fission, fusion, or radioactive decay) Chemical reactions – process of rearrangement of the molecular or ionic structure of a substance (making or breaking chemical bonds), as opposed to change in physical form or a nuclear reaction Energy and Matter Stability and change C.2.6 Describe nuclear changes in matter, including fission, fusion, transmutations, and decays. Emphasis is on simple qualitative models, such as pictures or diagrams, and on the scale of energy released in nuclear processes relative to other kinds of transformations. Nuclear changes – change in the number of protons or neutrons in the nucleus of an atom Matter – thing that has mass and takes up space Fission – splitting of a nucleus of an atom into two nuclei of lighter atoms and the release of energy Fusion – nuclei of light atoms join to form nuclei of heavier atoms Transmutation – the conversion of one element or nucleide into another either naturally or artificially Decay – nucleus of an unstable atom loses energy by emitting radiation Energy and matter Stability and change Structure and function C.2.7 Perform half-life calculations when the appropriate information about the isotope. Perform sample calculations and half-life to find time that has passed, original mass, final mass, and calculate half-life based on experimental data. Half-life – the time it for half of a radioactive sample to decay to a more stable isotope Isotope – any of two or more species of atoms of a chemical element with the same atomic number and nearly identical chemical behavior but with differing atomic mass or mass number and different physical properties Patterns proportion, and quantity Standard 3: Bonding and Molecular Structure Indiana Academic Standard Clarifying Statement Highlighted Vocabulary from the Standard Defined Crosscutting Concept
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