CHAPTER 6

2. Transition Metal- They are normally shown in two rows below all the other elements
4. Any of the five elements fluorine, chlorine, bromine, iodine, and astatine that form part of group VIIA of the periodic table and exist in the free state normally as diatomic molecules
7. Gas- The very last Group on the right
8. Series- A series of heavy radioactive metallic elements of increasing atomic number
9. Law- a law in chemistry: the elements when arranged in the order of their atomic numbers show a periodic variation of atomic structure and of most of their properties
11. Energy- The energy required to remove an electron from a gaseous atom or ion
13. the staircase that starts B and ends with Po
15. elements right of the metalloid staircase
18. An atom or group of atoms that carries a positive or negative electric charge as a result of having lost or gained one or more electrons
20. Element- The elements within the first two families (Groups I and II on the far left)

1. All elements to the left of the metalloid staircase
3. Metal- Any of various metallic elements (such as chromium, iron, and nickel) that have valence electrons in two shells instead of only one
5. Rule- Is a chemical rule of thumb that reflects observation that elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.
6. having a tendency to attract electrons
10. The elements from top to bottom
12. Metal- Any of the monovalent mostly basic metals of group I of the periodic table comprising lithium, sodium, potassium, rubidium, cesium, and francium
14. Series- The group of rare-earth metals
16. Earth Metal- Any of the divalent strongly basic metals of group II of the periodic table comprising beryllium, magnesium, calcium, strontium, barium, and radium
17. Element- Any of various metallic elements (such as chromium, iron, and nickel) that have valence electrons in two shells instead of only one
19. The elements left to right