1. CHEMISTRY REVIEW For Atomic Structure Test

2. Proton Neutron Electron1.
Subatomic Particle
Mass
Charge
Location
Proton 1 +
Nucleus
Neutron
No Charge
Electron -
Outside Nucleus

3. 2. The atomic number of an element is defined by its number of ( protons / neutrons / electrons ). 3. What is the name for atoms of an element that have different masses or number of neutrons? ISOTOPE 4. What isotope has 8 protons and 10 neutrons? Oxygen-18

4. 5. Identify the following for:
atomic number 20 mass number 41 protons 20 electrons (20-2) 18 neutrons (41-20) 21

5. 6. In a neutral atom, what subatomic particles are the SAME
6. In a neutral atom, what subatomic particles are the SAME? Protons = Electrons 7. What is the smallest particle of an element that maintains the properties of the element? Atom 8. A neutral atom of an element contains 12 electrons. What is the identity of this element? Mg 9. What is the name of the element that has an atomic number of 4? Beryllium 10. What do the dots represent in a Lewis Dot Diagram? Valence Electrons 11. Average atomic mass is the ( actual / weighted ) average of all the isotopes of an element.

6. 12. Identify if atom #1 and #2 are the same element or different elements using the information in the table.
Atom #1
Atom #2
Same or Different
3 protons, 3 neutrons
3 protons,4 neutrons
Same
B.  
4 protons, 4 neutrons
Different
C.  
3 protons, 4 neutrons
D.  
4 protons, 3 neutrons

7. 13. Which isotope of Carbon is the most abundant, naturally occurring one? a. Carbon-14 b. Carbon-13 C. Carbon What is the atomic mass of silicon if 92.21% of its atoms have a mass of u, 4.70% have mass u, and 3.09% have mass u? x = x = x = amu

8. Abundance (Percentage) ÷ 100 Mass x Percentage Answer
15. Find the average atomic mass of Krypton using the data table below:
Isotopic mass
Abundance (Percentage) ÷ 100
Mass x Percentage Answer
77.920u x
0.350% = =
0.27
79.916u x
2.27% = =
1.81
81.913u x
11.56% = =
9.47
82.914u x
11.55% = =
9.58
83.912u x
56.90% = =
47.75
85.911u x
17.37% = =
14.92
Answer: amu

9. 16. Fill in the data table below with the missing information:
Sublevel
Number Orbitals
Total Number of Electrons in Sublevel if ALL Orbitals are FULL s 1 2 p 3 6 d 5 10 f 7 14

10. 17. Identify the # of protons 1 , neutrons 2 and electrons 1 for 18
17. Identify the # of protons 1 , neutrons 2 and electrons 1 for 18. Write the full electron configurations for: Potassium (K) 1s2 2s2 2p6 3s2 3p64s1 Sodium (Na) 1s2 2s2 2p6 3s1 Neon (Ne) 1s2 2s2 2p6 Boron (B) 1s2 2s2 2p1 19. List all of the elements that will have a ground-state electron configuration that ends in s1? H, Li, Na, K, Rb, Cs, Fr 20. List all of the elements that will have a ground-state electron configuration that ends in p1? B, Al, Ga, In, Tl

11. 21. Identify the following elements:
1s2 Helium 1s2 2s2 2p6 3s2 3p3 Phosphorous [Ne] 3s2 3p6 Argon [Ne] 3s2 3p4 Sulfur [Ar] 4s2 3d10 4p2 Germanium [Ar] 4s2 3d10 4p5 Bromine

12. 22. Which element, in its ground state, has the following Orbital Diagram Below? Carbon 23. Electrons in an orbital must have ( opposite / same / no ) spin. 24. Which group of elements on the periodic table can we use for abbreviated electron configurations? Noble Gases 25. The electrons in the outer shell (highest energy level) are called: Valence Electrons

13. 26. How many valence electrons does each of the following have
26. How many valence electrons does each of the following have? Ga - 3 Li- 1 As - 5 Xe - 8 Mg - 2 O- 6 C - 4 F An atom that has different number of electrons and protons is an ( isotope / atom / ion ).

14. 29. Identify the following for magnesium-27 Protons: 12 Neutrons: (27-12) 15 Electrons: 12 Mass Number: 27 Atomic Number: Identify the number of electrons in the following: Cu+1 (29-1) = 28 P-3 (15+3) = 18 F-1 (9+1) = 10 Co+3 (27-3) = 24 Fe+2 (26-2) = 24 Zn+2 (30-2) = 28