Across
- 1. He developed the concept of the 'atom', Greek for 'indivisible'.
- 4. a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure.
- 7. It is a colloidal system of particles dispersed in gas.
- 8. A chemical element with the symbol Cu and atomic number 29.
- 10. Are colloids in which the liquid medium has become viscous enough to behave more or less as a solid.
- 13. Anything that has mass and occupies space.
- 14. A mixture in which one substance of microscopically dispersed insoluble or soluble particles is suspended throughout another substance.
- 16. A subatomic particle found in the nucleus of every atom except that of simple hydrogen.
- 18. A liquid which has passed through a filter.
- 19. A heterogeneous mixture that contains solid particles sufficiently large for sedimentation.
- 22. An ionic species with a positive charge.
- 24. Composed of two or more substances combined physically in variable proportions.
- 26. A pure substance containing two or more kinds of atom chemically combined in a definite proportion by mass.
- 27. Measured with a thermometer.
- 30. it is firm and stable in shape.
- 31. A phase transition where a liquid turns into a solid.
- 33. A colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air.
- 35. A substance composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid, and solid states.
- 36. A mixture whose composition varies from one position to another within the sample.
- 38. A chemical element with the symbol C and atomic number 6.
- 40. A chemical element with symbol Fe and atomic number 26.
- 41. Formed when many gas particles are trapped in a liquid or solid.
- 43. Chemically the simplest substances and hence cannot be broken down using chemical reactions.
- 44. Technique which involves the application of centrifugal force to separate particles from a solution according to their size, shape, density, viscosity of the medium and rotor speed.
- 45. A measure of mass per volume.
Down
- 1. A process of separating a homogeneous mixture composed of two substances with different boiling points.
- 2. The process of converting liquid to gas.
- 3. A process of separating the components of a suspension.
- 5. A colloidal suspension with solid particles in a liquid.
- 6. The ability of matter to react chemically with other substances.
- 9. A process that can be used in extricating mixtures that contain two substances with different melting points.
- 10. A state of matter that has no fixed shape and no fixed volume.
- 11. A chemical compound consisting of an ionic assembly of cations and anions.
- 12. An atom or molecule that has a net electrical charge.
- 15. The quantity of matter which a body contains.
- 17. A process of changing solid to gas without passing through the liquid state.
- 20. Atoms with the same atomic number but different mass numbers.
- 21. Composed of parts or elements that are all of the same kind.
- 22. The change in the state of matter from the gas phase to the liquid phase.
- 23. The smallest particles of matter.
- 24. An electrically neutral group of two or more atoms held together by chemical bonds.
- 25. Whatever remains or acts as a contaminant after a given class of events.
- 26. A way of separating out a mixture of chemicals, which are in gas or liquid form, by letting them creep slowly past another substance, which is typically a liquid or solid.
- 28. In chemistry, it refers to how close a measurement is to its standard or known value.
- 29. The smallest of the particles that make up an atom, and they carry a negative charge.
- 32. 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.
- 34. Amount of space occupied by a substance.
- 37. It is a silvery-white lustrous metal with a slight golden tinge.
- 39. The degree to which a chemical substance or a particular mixture of substances can damage an organism.
- 42. A process to separate mixtures by removing a liquid layer that is free of a precipitate, or the solids deposited from a solution.