1. Calcium, Silver, Neptunium By: Hannah Wills

2. Calcium atomic number- 20 atomic mass- 40.078 Protons-20Neutrons-20Electrons-20

3. Calcium Common Naturally Occurring Isotopes 40- 39.95259 41- 95227 42- 49.95861 43- 42.95876 45- 44.95618 46- 45.95389 47- 46.95454 48- 47.95253

4. To find the atomic mass… 40- (39.962590983) (.6941) + 41- (40.962278062) (0) + 42- (41.958618014) (0.6470+ 43- (44.9587618656) (0.135) + 44- (43.955481754) (2.086) + 45- (44.956186566) (0) + 46- (45.953692587) (0.004) + 47- (46.9454008) (0) + 48- (47.952534177) (0.187)

5. Calcium Bohr Model

6. Full and Abbreviated Electron Configuration 1s2, 2s2, 2p6, 3s2, 3p6, 4s2 [Ar] 4s2

7. Information on Calcium Calcium is found in rocks, chalk, and seashells. It’s found in the bones, muscles, and nerves of animals and humans, as well as, many plants. Sir Humphrey Davy discovered Calcium in 1808.

8. Silver atomic number-47 atomic mass- 107.8682 Protons-20Neutrons-61Electrons-20

9. Silver Common Naturally Occurring Isotopes 105- 104.9065 106- 105.9066 107- 106.9060 108- 107.9059 109- 108.9047 111- 110.9052

10. To find the atomic mass… 105- (104.906528661) (0) + 106- (105.906668921) (0) + 107- (106.90509682) (.51839) + 108- (107.905955556) (0) + 111- (110.905291157) (0)

11. Silver Bohr Model

12. Full and Abbreviated Electron Configuration 1s2,2s2,2p6,3s2,3p6,4s2,3d10, 4p6, 5s1, 4d10. [Kr] 5s1, 4d10.

13. Information about Silver Silver can be found in igneous and sedimentary ore like galena. No one actually knows who discovered the chemical element Silver, but there is evidence it was known to the ancients.

14. Neptunium atomic number-93 atomic mass- 237.0481 Protons-93Neutrons-144Electrons-93

15. Neptunium Common Naturally Occurring Isotopes 235- 235.0440 236- 236.0465 237- 237.0481

16. To find atomic mass… 40- (39.962590983) (.6941) + 41- (40.962278062) (0) + 42- (41.958618014) (0.6470+ 43- (44.9587618656) (0.135) + 44- (43.955481754) (2.086) + 45- (44.956186566) (0) + 46- (45.953692587) (0.004) + 47- (46.9454008) (0) + 48- (47.952534177) (0.187)

17. Neptunium Bohr Model

18. Full and abbreviated electron configuration for Neptunium 1s2, 2s2,2p6,3s2, 3p6, 4s2,3d10, 4p6,5s2,4d10, 5p6, 6s2, 4f14,5d10 6p6, 7s2, 5f4. [Rn] 5f4, 6d2, 7s2.

19. Information about Neptunium Neptunium is an artificial chemical element. Neptunium was first produced from Edwin M. McMillian and Philip H. Abelson.