Across
- 3. the chemical element of atomic number 5
- 4. a yellow precious metal, the chemical element of atomic number 79
- 5. known as a chemical reaction
- 7. denoting a factor of 1012
- 8. a particle with a positive charge that is in the nucleus of an atom
- 9. the basic unit of a chemical element.
- 10. degree of consistency measured by the quantity of mass per unit volume
- 13. a group of atoms bonded together
- 15. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
- 17. substance whose atoms all have the same number of protons
- 18. the branch of science concerned with the chemical and physicochemical processes and substances that occur within living organisms
- 21. the chemical element of atomic number 20, a soft gray metal
- 25. one tenth
- 27. a substance made by mixing other substances together
- 32. a colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.
- 33. a thing that is composed of two or more separate elements
- 36. a negatively charged subatomic particle
- 39. a yellow combustible nonmetal
- 40. the action of purifying a liquid by a process of heating and cooling.
- 42. a unit of linear measure equal to 3 feet
- 43. equal to one hundredth of a meter
- 44. a compound of a metal with the hydroxide ion OH−
- 46. a homogeneous mixture of two or more substances
- 47. denoting compounds which are not organic
- 49. the chemical element of atomic number 30
- 50. the action of measuring something
Down
- 1. the action of floating in a liquid or gas
- 2. the chemical element of atomic number 27, a hard silvery-white magnetic metal
- 5. a toxic, irritant, pale green gas
- 6. a soft silvery-white reactive metal of the alkali metal group.
- 11. the amount of space that a substance or object occupies
- 12. a unit of weight in general use equal to 16 oz
- 14. a substance that flows freely but is of constant volume
- 16. one hundredth
- 19. a colorless, odorless, highly flammable gas
- 20. the chemical element of atomic number 22
- 22. a force that can attract (pull closer) or repel
- 23. action or process of filtering something
- 24. a mathematical formula or a chemical formula
- 26. a chemical species that donates electrons, accepts protons, or releases hydroxide (OH-) ions in aqueous solution
- 28. an instrument for measuring and indicating temperature
- 29. firm and stable in shape
- 30. demonstrate a known fact.
- 31. a system or series of marks used for measuring or registering
- 34. ionized gas consisting of positive ions and free electrons in proportions resulting in more or less no overall electric charge
- 35. a unit of linear measure equal to one twelfth of a foot
- 37. a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element
- 38. Incredibly small
- 41. is a chemical element with the symbol Kr and atomic number 36
- 45. extremely small
- 48. the branch of science that deals with the identification of the substances of which matter is composed