science

6. Forms of matter (Solid,Liquid and Gas.)
7. an expression that shows the elements in a compound and the relative proportions of those elements
8. the positively charged central core of an atom
9. Abbreviation of a chemical element
10. a class of chemical elements with similar properties
13. those which lack all the metallic attributes.
14. Arrangement of elements
16. Chemically inactive

1. The mass of an atom
2. A chemical particle with a negative charge
3. the degree of combining power of an element as shown by the number of atomic weights of a monovalent element
4. elements that are good conductors of heat and electricity
5. Number of Protons and Electrons
11. Matter that can combine chemically
12. A chemical particle with a neutral charge
15. A chemical particle with a positive charge