Across
- 2. One of the seven horizontal rows in the periodic table. Every element in a row has the same number of electron levels.
- 5. The electrons are located in the _____ of the atom.
- 7. Negatively charged particles in an atom that are located outside of the nucleus.
- 8. all are radioactive and can be man made, have 7 energy levels
- 10. The ability of a substance to burn or ignite, causing fire or combustion.
- 11. Name of group 1 in periodic table, 1 valence electron and very reactive
- 14. Any change that affects the physical properties of a substance.
- 16. When a substance releases energy making it hot
- 21. Created the First periodic table, arranged it by increasing atomic mass
- 23. The temperature at which a liquid turns into a solid when cooled.
- 25. Same number of protons and neutrons as original element but different number of electrons.
- 27. Same number of protons and electrons as the original element but different number of neutrons
- 29. An object’s ability to dissolve
- 32. an insoluble solid that emerges from a liquid solution.
- 33. the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
- 35. Group 18, full outer shell, inert
- 38. The mass of an atom, on the periodic table
- 41. Negatively charged particles in the outermost electron shell of an atom. These electrons are those lost, gained or shared in bonding.
- 42. The measure of how much matter an object contains.
- 43. can be found naturally on Earth. Only on element in the series is radioactive, has 6 energy levels
- 45. the smallest piece of matter, can not be broken into smaller pieces, consists of a nucleus with protons and neutrons with electrons orbiting its nucleus.
- 48. How good electrons or heat moves through a substance
- 49. the physical combination of two or more substances
- 50. Group 17, 7 valence electrons very reactive
Down
- 1. Has no charge, found in the nucleus of an atom
- 3. The amount of space that matter takes up.
- 4. reorganized the Periodic Table in the early 1900’s according to increasing atomic number so now the elements within a period change in a predictable way
- 6. Any change that affects the chemical properties of substance.
- 9. The measure of the amount of matter in a given volume.
- 12. How shiny an objects is (how much light it can reflect)
- 13. Have some characteristics of metals and some of nonmetals, so hey are semiconductors, form a criss-cross pattern on the periodic table
- 15. used mathematical equations to describe the likelihood of finding an electron in a certain position. This atomic model is known as the quantum mechanical model of the atom.
- 16. an abbreviation or short representation of a chemical element
- 17. Groups 2-12 3-5 valence electrons, less reactive
- 18. Rings around the nucleus of an atom in which specific electrons are most likely located.
- 19. The temperature at which a liquid boils and turns to vapor.
- 20. Positively charged particles in the nucleus of an atom.
- 22. A state of matter where the molecules are a little bit spaced out able to move a little freely.
- 24. A state of matter where the molecules are very spaced out and able to move around freely.
- 26. The temperature at which a given solid will melt.
- 28. Group 2, 2 valence electrons, very reactive
- 30. has a pH level of more than 7, a chemical species that donates electrons or hydroxide ions or that accepts protons.
- 31. The 18 vertical columns in the periodic table. Each element in a group has the same number of electrons in its outer shell.
- 34. a substance whose atoms all have the same number of protons
- 36. a substance formed when two or more chemical elements are chemically bonded together.
- 37. repeating chemical and physical properties of elements change periodically with the atomic number of the elements
- 39. Any substance that has mass and takes up space by having volume.
- 40. A state of matter where the molecules are packed closely together and vibrating.
- 44. a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
- 46. When a substance absorbs energy making it cold
- 47. has a pH level of less than 7, molecule or other entity that can donate a proton or accept an electron pair in reactions