1 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt Light and Waves Periodic Trends Quantum Theory Mass, Atoms, Moles, and How Many Naming

2 Which has the higher energy: X-rays or Microwaves

3 X-rays

4 T/F Energy and wavelength are directly proportional

5 False E=

6 For the electronic transition in the hydrogen atom from n = 2 to n = 5 determine whether the radiation is emitted or absorbed during the transition.

7 absorbed

8 For the electronic transition in the hydrogen atom from n = 2 to n = 5, calculate the energy of the associated radiation.

9 Answer: E = * (1/n f 2 - 1/n i 2 ) E = * (1/25-1/4) E = 4.578* J

10 For the electronic transition in the hydrogen atom from n = 2 to n = 5, calculate the frequency and wavelength of the associated radiation.

11 Answer: E = * (1/n f 2 - 1/n i 2 ) E = * (1/25-1/4) E = 4.578* J E = hν ν = 4.578* / 6.63* ν = 6.909*10 14 Hz c = λν λ = 3.0*10 8 / 6.909*10 14 λ = 4.3*10 -7 m

12 T/F Within each group, ionization energy tends to increase from top to bottom.

13 False

14 Define ionization energy

15 The ease with which an atom LOSES an electron Increases going up and over

16 T/F More metallic atoms are found in the top left corner of the periodic table

17 False More metallic elements are found in the BOTTOM left corner of the periodic table

18 Explain what Z eff is, how it is calculated, and how it helps explain the periodic trends of Ionization Energy, Electron Affinity, and Atomic Radius.

19 Answer:

20 Arrange the following sets of atoms in order of increasing Ionic Size: I, Mg, O, F

21 Mg 2+, F -, O 2-, I -

22 Draw one example of d orbital:

23 Answer:

24 Give the set of four quantum numbers n, l, m l, and m s for the following electrons: The fourth electron to fall in the 3p orbital

25 3, 1, -1, -1/2

26 Identify the element and write its ground-state electron configuration: [Ne]3s 1 3p 2 4s 1 3d 2

27 Sulfur [Ne] 3s 2 3p 4

28 What is the electron configuration for Fe

29 Answer: [Ar]4s 2 3d 6

30 State Hund’s Rule

31 For degenerate orbitals, the lowest energy is attained when the number of electrons with the same spin is maximized

32 Estriol (C 18 H 24 O 3 ) is one of the three main estrogens produced by the human body. What is the molar mass of estriol?

33 Answer: MM = 12.01* * *3 MM = g/mol

34 How many moles of estriol (C 18 H 24 O 3 ) are present in 2.30 mg of estriol?

35 Answer: 2.30 mg * g * mol = 1000 mg g 7.99*10 -6 mol

36 How many molecules of estriol (C 18 H 24 O 3 ) are present in 2.30 mg of estriol?

37 Answer: 2.30 mg * g * mol * 6.022*10 23 molecules = 1000 mg g 1 mol 4.80*10 18 molecules

38 How many hydrogen atoms are present in 2.30 mg of estriol (C 18 H 24 O 3 )?

39 Answer: 2.30 mg * g * mol * 6.022*10 23 molecules * 24 H atoms = 1000 mg g 1 mol1 molecule 1.15*10 20 H atoms

40 How many protons are present in 2.30 mg of estriol (C 18 H 24 O 3 ) ?

41 Answer: C = 6(18) prot H = 1(24) proO = 8(3) pro Total protons = mg * g * mol * 6.022*10 23 molecules*156 protons = 1000 mg g 1 mol1 molecule 7.49*10 20 protons

42 Name the following compound: MgO

43 Magnesium oxide

44 Name the following compound: Cu(NO 3 ) 2

45 Copper (II) nitrate

46 Name the following compound: H 2 CO 3

47 Carbonic acid

48 Write the chemical formula for each substance mentioned. The substance phosphorus trihydride, commonly called phosphine, is a toxic gas.

49 PH 3

50 The following description refers to which of the following compounds? A yellow solid at room temperature and 1 atm. (A) CH 4 (B) CCl 3 F (C) H 2 S (D) H 2 O 2 (E) K 2 CrO 4

51 (E) K 2 CrO 4