2. 1. What are these two atoms of carbon called?
ISOTOPES

3. 2. What is the same about these three atoms?
SAME NUMBER OF PROTONS BECAUSE THEY ARE THE SAME ELEMENT

4. Here are three isotopes of an element: 612C 613C 614C
3. The element is: CARBON

5. 612C 613C 614C 4. The number 6 is the number of ______________.
PROTONS

6. 612C 613C C
5. The 12, 13 & 14 are the ____________ of the different atoms.
MASSES

7. 612C 613C C
6. How many neutrons are in the last isotope?
14-6=8

8. 7. The same element MUST have the same number of A protons B neutrons C electrons

9. The average atomic mass of Calcium is 40.08 amu.
8. What is the mass of the most common isotope of Calcium? 40 amu Calcium-40 is the most common isotope

10. 9. What element does this picture represent?
BERYLLIUM
4 ELECTRONS MEANS 4 PROTONS

11. An isotope of Fluorine has a mass of 19 amu and an atomic number of 9.
10a. How many protons does Flourine have? 9
10b. How many neutrons are in this isotope?
19-9=10