Across
- 2. of Conservation of Mass is a relation stating that in a chemical reaction, the mass of the products equals the mass of the reactants.
- 3. Sphere Atoms can neither be created or destroyed in a chemical reaction.
- 4. the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
- 8. Life The time required to convert one half of a reactant to product
- 10. is a material system made up of two or more different substances which are mixed but are not combined chemically
- 12. the term for any type of material
- 14. Model Theory or model giving an explanation of the properties of the atomic nucleus and its interactions with other particles.
- 17. One of two or more atoms that have the same atomic number (the same number of protons) but a different number of neutrons.
- 19. A reaction equilibrium in which the reactants and products are all in the same phase.
- 20. Pudding Model The Plum Pudding Model is a model of atomic structure proposed by J.J. Thomson in the late 19th century
- 22. composed of parts of different kinds; having widely dissimilar elements or constituents
- 25. a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign
Down
- 1. A positive ion; an atom or group of atoms that has lost one or more electrons.
- 5. A substance that cannot be decomposed into simpler substances by chemical means, and is made up of atoms all with identical number of protons
- 6. Number the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
- 7. Number the total number of protons and neutrons (together known as nucleons) in an atomic nucleus.
- 9. Substance substances that are made of only one type of atom or only one type of molecule
- 11. Cloud Model where electrons are when they go around the nucleus of an atom
- 13. is any atom that is not carbon or hydrogen.
- 15. the spontaneous emission of radiation in the form of particles or high energy photons resulting from a nuclear reaction.
- 16. a substance formed when two or more chemical elements are chemically bonded together
- 18. a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
- 20. Model The model described the atom as a tiny, dense, positively charged core called a nucleus, in which nearly all the mass is concentrated, around which the light, negative constituents, called electrons, circulate at some distance, much like planets revolving around the Sun.
- 21. An atom or a group of atoms that has an electric charge.
- 23. The basic unit of a chemical element.
- 24. a negatively charged ion, as one attracted to the anode in electrolysis.