Across
- 2. number: The sum of the number of protons and neutrons in its nucleus
- 4. bond: Formed by losing and gaining of electrons between metal and nonmetal
- 6. Uncharged particle found within the atomic nuclei
- 7. figures: The digits in any measurement that are known with certainty plus one digit which is uncertain
- 9. it is a branch of chemistry that studies the chemical processes within and relating to living organisms. Biochemical processes give rise to the complexity of life.
- 10. The quantity of matter in the body
- 12. Formed when atom loses or gains electron
- 15. chemistry: the branch of chemistry concerned with the application of the techniques and theories of physics to the study of chemical systems.
- 17. mixture: Called as solution: a mixture with uniform composition.
- 19. a period of time equal to sixty seconds or a sixtieth of an hour.
- 20. level: Specific energy value of electrons for an atom
- 22. Horizontal row in the periodic table
- 27. mixture: Mixture whose a composition varies from position to position within a sample.
- 30. the quality, condition, or fact of being exact and accurate.
- 34. Substance consisting of only one kind of atom
- 35. Separates components of mixture at different boiling points.
- 36. Positively:charged subatomic particle of an atom
- 40. the size: length: or amount of something: as established by measuring.
- 42. the closeness of a single measurement to its true value
- 43. physical property: physical property that does not depend on the size or amount of the sample
- 44. phase change in which liquid is converted to gas
- 45. the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact: combine: and change; and the use of these processes to form new substances.
- 47. The amount of space occupied by a substance
- 48. Elements found in the zigzag order in the periodic table
- 50. Phase change in which liquid is converted to solid
- 51. Elements at the left side and in the center of the periodic table
Down
- 1. a substance that flows freely but is of constant volume: having a consistency like that of water or oil.
- 2. Anything that has mass and occupies space
- 3. a substance or object that is solid rather than liquid or fluid
- 5. inner transition elements located in the first row of the f:block in the periodic table
- 8. compound: Compound that consists of two charged ions
- 11. Group 7A elements
- 13. Composed of two or more substances: combined physically in variable proportions
- 14. separation: The separation of elemental metals from the mixtures
- 16. the measurement or extent of something from end to end
- 18. rule: states that atoms other than hydrogen tend to form bonds until surrounded by eight valence electrons
- 21. Organic compound with carbon and oxygen only
- 23. movement of one fluid through another.
- 24. the fundamental unit of length in the metric system: equal to 100 centimeters or approximately 39.37 inches.
- 25. a substance or matter in a state in which it will expand freely to fill the whole of a container: having no fixed shape and no fixed volume.
- 26. gas: insert gas located at the rightmost side of the periodic table
- 28. a metric unit of length: equal to one hundredth of a meter.
- 29. Phase change that involves the conversion from solid to liquid
- 31. Chemistry: it is a branch of chemistry that deals with synthesis and behavior of inorganic and organometallic compounds.
- 32. Element that appears at the far right side of the periodic table
- 33. Negatively:charged subatomic particle of an atom
- 37. Ratio of the mass of an object to the volume occupied by that object.
- 38. chemistry: it is a branch of chemistry that studies the structure: properties and reactions of organic compounds: which contain carbon in covalent bonding. Study of structure determines their chemical composition and formula.
- 39. Process in which the solid particles are filtered to allow the liquid or filtrate to pass through the filter: and be collected as residue
- 41. chemistry: it is a branch of chemistry that studies and uses instruments and methods used to separate: identify: and quantify matter.
- 46. mass: Indicates that one mole of an element has a mass in grams numerically equal to its atomic mass units
- 49. a metric unit of capacity: formerly defined as the volume of one kilogram of water under standard conditions: now equal to 1:000 cubic centimeters