1. Atoms and the Periodic Table
Review Answers

2. Complete the chart showing the basic info about the atom:
What does the atomic number tell you?
3. The number of ______________ determines the type (identify) of the element.
4. Why are atoms neutral (have no charge)?
Particle
Charge
Mass
Location
Proton
Neutron
Electron

3. 5. What are different forms of the same element called. 6
5. What are different forms of the same element called? 6. Isotopes have the same number of _______ but different numbers of ______________. 7. Which of the following pairs are isotopes of the same element? 8. Why are atomic masses written as averages? 9. An atom has 8p, 8n, and 8e. What element is it?

4. 10. An atom has 79p, 118n, and 79e. What element is it. 11
10. An atom has 79p, 118n, and 79e. What element is it? 11. What is a characteristic of an unstable isotope? 12. What are the rows of the periodic table called? 13. What are the columns of the periodic table called? 14. What happens to the number of valence electrons as you move across the periodic table? 15. What happens to the number of energy levels as you moved down the periodic table?

5. 16. Why do elements in the same group have similar properties. 17
16. Why do elements in the same group have similar properties? 17. Elements in the same period have the same number of _________ ____________. 18. Elements in the same group have the same number of 19. Where are the metals located on the periodic table? 20. Where are the nonmetals located on the periodic table? 21. Where are the metalloids located on the periodic table?

6. 22. Which element has the same number of valence electrons as sulfur (S)? 23. How are sodium and magnesium atoms similar? 24. Which elements are in the same period? 25. What do Na, Mg, K, Ca, Cr, Au, and Li have in common? 26. Which element has one more proton than gold (atomic number 79)? 27. How many valence electrons does Barium have?

7. 28. How many valence electrons does Bromine have? 29. Name one nonmetal. 30. Which element is in period 4 and has 5 valence electrons? 31. Which element is in period 4 and has 8 valence electrons? 32. Which element is in period 3 and has 2 valence electrons? 33. Which element has one more proton than carbon?

8. 34. Which of the following has 4 energy levels. 35
34. Which of the following has 4 energy levels? 35. Which of the following has 4 valence electrons? 36. Which pair of elements has the same number of energy levels? 37. Which describes an element with an atomic number of 20? 38. An element with an atomic number of 35 and a mass number of 80 has how many neutrons? 39. What is the mass number of an atom with 19p, 20n, and 19e?

9. 40. How many protons are in an atom of silicon. 41
40. How many protons are in an atom of silicon? 41. How many electrons are in an atom of Argon? 42. A neutral atom of aluminum has how many electrons?

10. You should study the STUDY GUIDE, NOTES, QUIZZES, and BELL RINGERS
Other information:
Group 1 elements are called Alkali Metals
Group 2 elements are called Alkaline Earth Metals
Group 17 elements are called Halogens
Group 18 elements are called Noble Gases
You should study the STUDY GUIDE, NOTES, QUIZZES, and BELL RINGERS