Across
- 3. rule/a chemical rule of thumb that states that atoms of low (<20) atomic number tend to combine in such a way that they each have eight electrons in their valence shells, giving them the same electronic configuration as a noble gas
- 5. a chemical element with symbol H and atomic number 1
- 8. reactant or product in a particular reaction is intuitively defined as how fast or slow a reaction takes place
- 10. the separation of a chemical compound into elements or simpler compounds
- 12. solving/consists in using generic or ad hoc methods, in an orderly manner, for finding solutions to problems
- 13. chemical reaction in which an acid and a base react to form a salt
- 17. change in rate of a chemical reaction due to the participation of a substance called a catalyst. Unlike other reagents that participate in the chemical reaction, a catalyst is not consumed by the reaction itself
- 19. charge/having a surplus of electrons; having a lower electric potential
- 20. formation of a solid in a solution or inside another solid during a chemical reaction or by diffusion in a solid.
- 24. process or reaction in which the system absorbs energy from its surroundings in the form of heat
- 26. charge/having a deficiency of electrons; having a higher electric potential
- 27. substance participating in a chemical reaction, especially a directly reacting substance present at the initiation of the reaction.
- 28. characterized by structural rigidity and resistance to changes of shape or volume
Down
- 1. to the quantity of matter in an object. More specifically, inertial mass is a quantitative measure of an object's resistance to acceleration.
- 2. reaction in which two or more substances combine to produce a single substance is known as combination, or synthesis reaction
- 4. chemical compound with the chemical formula H2O
- 6. of it are oxygen,carbon dioxide and noble gases
- 7. as the pattern to solve a chemical problem
- 9. table/ is a table of the chemical elements in which the elements are arranged by order of atomic number in such a way that the periodic properties of the elements are made clear
- 11. unit of measurement used in chemistry to express amounts of a chemical substance, defined as the amount of any substance that contains as many elementary entities as there are atoms
- 12. inorganic chemical, is a salt of phosphoric acid. In organic chemistry, a phosphate, or organophosphate, is an ester of phosphoric acid
- 14. chemical reaction that releases energy in the form of light or heat
- 15. branch of chemistry that deals with the relative quantities of reactants and products in chemical reactions
- 16. during chemical reactions as reagents are consumed
- 18. indirectly observed quantity which comes in many forms, such as kinetic energy, potential energy, radiant energy
- 21. the sequence of exothermic chemical reactions between a fuel and an oxidant accompanied by the production of heat and conversion of chemical species
- 22. physical quantity that is a measure of hotness and coldness on a numerical scale
- 23. equation/the symbolic representation of a chemical reaction where the reactant entities are given on the left hand side and the product entities on the right hand side.
- 25. serves as the proving of an chemical change
- 29. is the only state with a definite volume but no fixed shape