Across
- 4. The smallest unit of an element that maintains the chemical properties of that element is a(n)__________________.
- 6. Helium symbol.
- 8. oxygen symbol.
- 9. The metric prefix that means 1/1000.
- 10. A theory that states that particles are always in motion, especially when their temperatures are increasing.
- 11. Reactive metals that are found in group 2 and form +2 ions. (magnesium, calcium,etc.)
- 12. The _____________ force is the upward force that keeps an object immersed in or floating on a fluid.
- 13. Hydrogen symbol.
- 14. Elements on the periodic table that are malleable, conductive, shiny or lustrous, usually solid, and form + ions.
- 17. Coal, oil, and natural gas are all types of _____________ that are nonrenewable energy sources that come from the remains of dead plants and animals.
- 18. The metric prefix that means 1000.
- 19. A combination of 2 or more substances that are not chemically combined.
- 20. A graduated cylinder helps one measure the ___________ of a liquid.
- 24. Metric unit for measuring temperature; On this scale water freezes at zero and boils at 100.
- 27. A state of matter with indefinite shape and definite volume.
- 29. Elements on the periodic table that are dull, maybe solid or gas, good insulators, and usually form - ions.
- 34. Iron symbol.
- 36. Sodium symbol.
- 38. - charge particle found in various energy orbitals outside the nucleus; insignificant mass.
- 40. A sample of matter, either a single element or a single compound that has definite chemical and physical properties. You can also write either a formula or symbol for it.
- 42. The resistance of a fluid to flow is called _____________________.
- 43. A substance that cannot be broken down into simpler substances by chemical means is a(n) ________________________.
- 45. Phosphorus symbol
- 46. The standard basic unit of mass is the __________.
- 47. The change from a solid directly into a gas.
- 48. In a chemical _________________ atoms are always rearranged.
- 49. The standard basic unit of length is the __________.
- 50. When 2 different atoms of the same type have different masses because they contain different numbers of neutrons they are called _____________ ?
- 52. The change of a solid into a liquid.
- 55. Solar, hydroelectric (water), geothermal, and wind power all represent _____________ sources of energy.
- 56. In addition to physics, the other main science that involves the study of matter.
- 57. The law of conservation of ____________ says that matter cannot be created or destroyed, but it can be transformed from 1 form to another.
- 59. The metric prefix that means 1/100 or 0.01.
- 60. Particle found in the nucleus of an atom, has a mass of 1 a.m.u., has a +1 charge.
Down
- 1. If a substance reacts with acid to form hydrogen this is an example of a __________________ property.
- 2. A substance is green, has a mass of 2.0g, a density of 5.0 g/cm3, and is able to dissolve in water. These are all examples of ________________ properties.
- 3. Milk and lemonade are both solutions that when mixed, look the same throughout. This makes them __________________ mixtures.
- 5. A representation of an object or event that can be studied to understand the real object or event.
- 7. Chlorine symbol.
- 10. Potassium symbol.
- 13. Polluted city air and Italian salad dressing are examples of a _________________ mixture.
- 15. Reactive metals that are found in group 1 and form +1 ions. (Lithium, sodium, potassium, etc.)
- 16. A state of matter with definite shape and volume; the particles have the strongest attraction for one another.
- 21. A group of atoms of the same or different types that are chemically combined and act as a single unit is called a(n)______________.
- 22. Gold symbol.
- 23. The simplest element on the periodic table with an atomic number of 1 (1 proton).
- 24. The change of a gas into a liquid.
- 25. Elements that exhibit properties of metals and nonmetals.
- 26. State of matter with indefinite shape and volume; the particles have the least amount of attraction for one another.
- 28. A substance made of atoms of two or more different elements joined by chemical bonds.
- 30. The metric system is an easy system to use because it is all based on powers of _________.
- 31. When liquids turn into solids, the atoms or molecules become more ordered in this process.
- 32. Anything that has mass and takes up space.
- 33. When water freezes, the size of the particles ______________________.
- 35. The change of a liquid into a gas.
- 37. Particle found in the nucleus, has a mass of 1 a.m.u., has 0 charge.
- 39. Nitrogen symbol.
- 41. The change of a liquid into a gas.
- 44. The capacity or ability of a substance to combine chemically with another substance is called ______________.
- 51. Reactive nonmetals that are found in group 17 and form +1 ions. (Fluorine, chlorine, etc.)
- 53. Besides "scale," another name used to describe an instrument that determines the mass of an object.
- 54. The ratio of the mass of a substance to the volume of the substance is known as _______________.
- 58. The standard basic unit of volume is the __________.