Chemistry

3. substance that cant be broken down into any other substance by chemical reactions
5. a thing that is composed of two or more elements
7. the number that tells how many protons are in an element
11. a bond between two nonmetals
12. the mass of a chemical element
13. the vertical columns on the periodic table
15. part of an atom with a negative charge

1. part of an element with no charge
2. showcases all of the chemical elements in order by their atomic number
4. a bond formed when the valence electrons of one atom permanently transfer to another atom
6. a row of chemical elements
8. a noble gas with 10 neutrons
9. an element with properties of metal and nonmetal
10. particles that make up everything
14. part of an atom with a positive charge