Across |
3. | a theory that all matter is made of tiny units called atoms |
4. | is an outer shell electron that is associated with an atom |
5. | the number of atoms or molecules in one mole of a substance that equal to 6.023 × 1023. |
6. | reactivity to other chemical is a type of |
7. | a table display full of the chemical elements |
8. | characteristic of a substance that is observed during a reaction |
10. | to find this you add the # amount neutrons and atomic mass |
13. | characteristic of matter that can be observed and measured without changing the chemical identity of the sample. |
17. | a nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy. |
20. | two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons |
21. | the mass of a given chemical element or chemical compound divided by the amount of substance. |
22. | an atom with a negative chart |