Unit 7 Enrichment Project

3. a change that does not alter the properties of a substance
6. The basic unit of a chemical element
10. nonreactive family of nonmetals with 8 valence electrons
13. has six protons, and 4 valence electrons
15. has an atomic mass of 39.098, its periodic symbol is K
16. in family 4, its periodic symbol is Ti
19. tranistion metal, its periodic symbol is Au
20. in family 10, has an atomic mass of 58.693
21. in family 11, has 29 protons
22. an electron in the outermost shell, which can be transferred or shared with another atom
26. family with 6 valence electrons
31. an element that has some characteristics of both metals and nonmetals
32. a class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity
33. a substance at the end of a chemical reaction
36. in family 8, has 26 protons
37. families 3-12 on the periodic table
38. is named after California, its periodic symbol is Cf
41. discovered by marie curie,has 2 valence electrons
42. nonmetal with 16 protons
43. discovered by Marie Curie, named after Poland
44. named after a planet, in family 12
46. a substance that is present at the start of a chemical reaction
48. bond formed from the transfer of an electron or electrons
49. the heaviest element, has 116 protons
50. family with 3 valence electrons

1. in family 18, has 10 protons
2. a symbolic representation showing the kind and amount of the starting materials and products of a reaction
4. metalloid in family 14
5. a chemical bond formed when two atoms share electrons
7. metalloid with 3 Valence electrons
8. Noble gas that doesn't have 8 valence electrons
9. metals found in group 2 of the periodic table
11. the principle that the total amount of matter is neither created nor destroyed during any chemical or physical change
12. nonmetals with 7 valence electrons in its outermost shell
14. family with 4 valence electrons
17. First element on the periodic table
18. the most reactice group of metals
23. named after America, its atomic mass is 243.061
24. a substance made of two or more elements chemically combined in a specific ratio, or proportion
25. a change that results in new products with new properties
27. combines with chlorine to make salt
28. an element that lacks most of the properties of a metal
29. named after Pluto, its atomic mass is 244.064
30. has 36 protons, doesn't react to anything
34. element named after Albert Einstein
35. the most reactive element on the periodic table
39. in family 11, its periodic symbol is Ag
40. a neutral group of two or more atoms held together by covalent bonds
45. named after the planet Neptune,has 93 protons
47. family with 5 valence electrons