1. Atoms & the Periodic Table
Test Review
2011

2. Proposed the idea that matter is formed of small pieces that cannot be divided into smaller pieces
Democritus

3. Also known as the cookie dough model, he described an atom that consisted of negative charges scattered throughout a ball of positive charge
J.J. Thompson

4. According to Dalton’s atomic theory,
All atoms of the same element are exactly alike

5. Rutherford’s gold foil experiment led him to conclude that
An atom contains a small, dense, positively charged center, called the nucleus

6. His model resembled the planets orbiting the sun
Bohr

7. Chadwick discovered this particle in the nucleus that was hard to detect because it had the same mass as a proton and was electrically neutral
Neutron

8. This model describes an atom as consisting of a nucleus that contains protons and neutrons, surrounded by a cloudlike region of moving electrons
The Modern Model

9. What is the charge of a proton, neutron, and electron?
Proton = positive
Neutron = neutral, no charge
Electron = negative

10. Atoms contain equal numbers of
Protons and Electrons

11. Which statement correctly compares the masses of two subatomic particles?
A. The mass of an electron is the same as the mass of a proton
B. The mass of an electron is much greater than the mass of a proton
C. The mass of a proton is much greater than the mass of an electron
D. The mass of a proton is much greater than the mass of a neutron

12. Which statement correctly compares the masses of two subatomic particles?
ANSWER
C. The mass of a proton is much greater than the mass of an electron

13. This represents the number of protons in an atom
Atomic number

14. This represents the number of protons and neutrons in an atom
Mass number

15. A lithium isotope consists of 3 protons, 3 electrons, and 4 neutrons
A lithium isotope consists of 3 protons, 3 electrons, and 4 neutrons. Its MASS NUMBER is 7
3 protons + 4 neutrons = 7

16. How many neutrons does and atom of Fluorine-19 have?10
Mass number – # protons = # neutrons
19-9 = 10

17. An atom with 15 protons, 16 neutrons, and 15 electrons would be an atom of….use the periodic table to help you!!
Phosphorus

18. Use a Periodic Table to identify the atomic number of Aluminum13

19. Use a Periodic Table to identify the atomic mass of Potassium
or 39

20. Use a Periodic Table to identify the number of protons in an atom of Nitrogen7

21. Use a Periodic Table to identify the number of neutrons in an atom of Chlorine18
35-17 = 18

22. Use a Periodic Table to identify the number of electrons in an atom of Boron5

23. An electron that is found in the outermost shell of an atom
Valence electron

24. How many valence electrons does Boron have?3

25. Carbon has 4 valence electrons
Carbon has 4 valence electrons. How many dots will the Lewis structure have? Draw it. 4

26. Draw the Lewis structure for Magnesium.

27. Draw the Lewis structure for Bromine.

28. In what period is Sodium?3

29. Sodium has 11 electrons. Draw the Bohr diagram for Sodium.

30. Which of the following is a nonmetal?
A. Iron
B. Mercury
C. Aluminum
D. Chlorine

31. Which of the following is a nonmetal?
ANSWER
D. Chlorine

32. Which of the following lists contains a metal, a nonmetal, and a metalloid?
Na, K, Cs
Mg, F, Br
Zn, Cu, Al
Na, Si, O

33. Which of the following lists contains a metal, a nonmetal, and a metalloid?
ANSWER
Na, Si, O

34. Which of the following most likely conducts electricity well and is malleable?
A. Magnesium
B. Neon
C. Germanium
D. Carbon

35. Which of the following most likely conducts electricity well and is malleable?
ANSWER
A. Magnesium

36. Most metals are ____ at room temperature.
Solid

37. Which group of elements is the most reactive group?
Alkali Metals

38. The noble gases have almost NO reactivity because
Their outermost energy levels are filled

39. Which of the following is a transition metal?
A. Calcium
B. Iron
C. Magnesium
D. Sulfur

40. Which of the following is a transition metal?
ANSWER
B. Iron