chemistry

2. the one or two letters that represent a symbol
5. The group on the periodic table that has the elements lithium, sodium potassium, Rubidium, Cesium, and francium
7. Two or more elements chemically bonded together
11. a diagram that shows all the known elements in order of there atomic number
12. a group on the periodic table that consist of the elements carbon, nitrogen, oxygen, phosphorous, Hydrogen, sulfur, and selenium
13. a type of ion the is negative from gaining an electron
14. a type of ion that is positive from losing an electron
15. the small number that indicates the number of each element in a compound

1. the first element on the periodic table
3. the number on the top right of an element that indicates the number of protons
4. shown by number of protons, it's negative
6. the type of boning that involves atoms sharing electrons
8. Two or more thing that are combined but not chemically bonded together
9. shown by the atomic number of an element, it's positive
10. the type of bonding where one atom takes an electron from another