Review TEST: ATOMS. 1. Which element does this atomic model represent? How can you tell?

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Presentation transcript:

Review TEST: ATOMS

1. Which element does this atomic model represent? How can you tell?

1. Iron—atomic number of 26

2. What is the charge of this atom’s nucleus?

3. What 2 particles of this atom work together to form a neutrally charged atom?

3. Protons (+) and electrons (-)

4. Describe the particles that exist in this atom’s outer region.

4. Negative electrons, mass=.001

5. What is the charge of this atom’s cloud?—be specific!

5. +18

6. How many valence electrons does this model have?

6. 3

7. What is the overall charge of this atom’s center-most region?—its atomic number is 42!

7. +42

8. Tell me all you can about the particles that exist in the nucleus of this atom with the protons.

8. Neutral neutrons, mass=1 AMU, there are 4 in lithium

9. Identify this element

9. carbon

10. What is wrong with this model?

10. Place both electrons in 1 st level

11. How many valence electrons will a single atom of this element have?

11. 3

12. Will this element be stable/inert or reactive? How can you tell?

12. Reactive…valence level not full!

13. What particle in this atom gives it its identity?

13. proton

14. What is the overall charge of this atom? Why?

14. Neutral…3-3=0

15. Is this atom stable/inert? How can you tell?

15. No valence shell is not full

16. What element do I represent?

16. carbon

17. What element am I? Mass (amu)Atomic numberDensity (g/mL)# of valence electrons

17. Tantalum Look back at the table!

18. Without the electrons, what is the exact charge of this atom?

18. -3…note the 3 electrons

19. If we add 50 million neutrons to this atom, what will the overall charge be ?

19. Still neutral

20. If we take away an electron from this atom, what will its overall charge be?

20. +1…now you have 1 more proton than you have electrons.

21. Without the electrons, what is the exact charge of this atom?

21. +3

22. What will determine this substances reactivity?

22. The number of valence electrons

23. If we add 2 protons to this model, how will it be affected?

23. It will become boron

24. What is my identity?

24. lithium

25. If an atom has 3 electron energy levels that are all full, what would be the identity of the atom?

25. argon

26. If an atom has 4 protons, 5 neutrons, and 4 electrons, what would its atomic mass number be?

26. beryllium

27. Why is the electron cloud less massive than the nucleus even though it is larger—takes up more space?

27. The electrons are so much lighter!=.001 AMU