Across
- 5. measure of mass per volume.
- 9. any persistent attraction between atoms, ions, or molecules that enables the formation of chemical compounds.
- 10. soft gray metal,with an atomic number of 20.
- 15. basic unit of a chemical element.
- 16. anything that occupies space.
- 18. a subatomic particle of about the same mass as a proton but without an electric charge.
- 20. it is a mixture where particles are distributed non-uniformly.
- 21. it is a precious metal, it is also edible, its atomic symbol is Au.
- 24. it is a substance formed from two or more elements chemically united in fixed proportions.
- 27. a unit that measures the amount of a substance in terms of the absolute number of particles or entities composing the substance.
- 29. he created the plum pudding model.
- 30. these elements are odorless, colorless, monatomic gases with very low chemical reactivity.
- 31. he is a greek philosopher who believed all elements are made of fire, water, earth and air.
- 36. a mixture of metals or a metal and another substance.
- 38. any chemical element which is a good conductor of both electricity and heat and which readily forms cations and ionic bonds with non-metals.
- 39. the change of one or more substances into one or more different substances.
- 41. it is a special type of homogeneous mixture composed of two or more substances.
- 43. ability to dissolve.
- 44. digits that carry meaningful contributions to its measurement resolution
- 45. a stable subatomic particle with a charge of negative electricity, primary carrier of electricity.
- 46. object or material that allows the flow of an electric current in one or more directions.
- 47. a negatively charged ion
- 48. it is the lightest element in the periodic table.
Down
- 1. it is a mixture where particles are distributed uniformly.
- 2. it is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed.
- 3. the creator of the periodic table.
- 4. the branch of science that deals with the identification of the substances of which matter is composed
- 6. it is a measure of the space occupied by an object.
- 7. a substance that dissolves solute.
- 8. it is a variant of a particular chemical element which differs in the number of neutrons present in the nucleus.
- 11. greek word that means uncut
- 12. As solid matter is heated it eventually melts or changes into a liquid state.
- 13. the medieval version of chemistry
- 14. a positively charged ion
- 17. a stable subatomic particle, with a positive electrical charge equal in magnitude to that of an electron
- 19. how many states of matter are there?
- 22. he introduced the atomic theory.
- 23. change that takes place without any changes in molecular composition.
- 24. any object or material that allows the flow of an electric current in one or more directions.
- 25. the product of the random distribution of one substance through another without any chemical reaction, as distinct from a compound.
- 26. it is also known as iron oxide.
- 27. it is a property of physical matter that is a measure of its resistance to acceleration when a net force is applied.
- 28. it uses heat to separate substances.
- 32. most abundant element in the earth's crust
- 33. the action or process of filtering something.
- 34. a compound made of sodium and chlorine.
- 35. it is distinguished by its atomic number.
- 37. it is a chemical substance that dissolves metals, typically a corrosive or sour-tasting liquid.
- 40. change that takes place with changes in molecular composition.
- 42. a separation method that uses a porous or perforated device or material in order to separate out any solid matter.