Chemistry Ch. 4 & 5 Exam Review
2.35 m
A radio station broadcasts a program at 127.7 MHz. Calculate the wavelength of the radio wave at this frequency.
1ˢᵗ E=1.80 x 10⁻¹⁹ J 2ⁿᵈ E=3.25 x 10⁻¹⁹ J
Calculate the energies of two radiations. The first radiation is of wavelength 414 nm and the second is of a wavelength of 611 nm. The value of Plank's Constant is 6.626 x 10⁻³⁴
a) 16 b) 16 c) 16 d) 20 e) 44 f) 20
List the information needed to complete the table.
D. D
The box for an element from the periodic table is shown what is the atomic mass? A. A B. B C. C D. D
True
True / False: Although the precise location of an electron cannot be determined, it is possible to determine the probability that an electron will occupy a certain region around the nucleus
False
True / False: An s orbital is in the shape of a dumbbell
True
True / False: As the amount of energy carried by a wave decreases, its wavelength increases
False
True / False: In a neutral atom, the number of protons is equal to the number of neutrons
False
True / False: In the notation 107/47 Ag, 107 represents the atomic number and 47 represents the atomic mass of silver
False
True / False: Isotopes are forms of an element that have the same number of protons but a different number of electrons
True
True / False: The mass of a neutron is approximately equal to the mass of a proton
True
True / False: The modern periodic table is arranged by increasing atomic number of the elements.
True
True / False: Valence refers to the total number of electrons that exist in the orbitals that occupy the outermost energy level of an atom
False
True / False: [Kr] 5s² 4d¹⁰ 5p⁵ is the correct electron configuration for the element bromine
A. 468 nm
Use Plank's constant, 6.626 x 10⁻³⁴, to solve the following: A photon is emitted from an atom with an energy of 4.25 x 10⁻¹⁹ J. What is the wavelength of the photon? A. 468 nm B. 2.73 x 10⁻⁴ m C. 1.28 x 10⁻¹⁰ m D. 6.42 x 10¹⁴ m
C. 3.78 x 10⁻¹⁹ J
Use Plank's constant, 6.626 x 10⁻³⁴, to solve the following: What is the amount of energy carried by a photon that has a frequency of 5.71 x 10¹⁴ Hz? A. 524 nm B. 1.14 x 10⁻⁸ J C. 3.78 x 10⁻¹⁹ J D. 8.62 x 10⁴⁷ J/s
Average Atomic Mass: 106.65
What is the Average Atomic Mass of this element?
D. 21/9 F
What is the correct symbol for this atom? A. 11/9 F B. 21/11 F C. 18/11 F D. 21/9 F
Cl: 1s² 2s² 2p⁶ 3s² 3p⁵ (7 valence electrons)
What is the ground electron configuration of Chlorine and valence electrons?
D. 21
What is the mass number of the atom shown? A. 9 B. 19 C. 20 D. 21
B. Chromium (Cr)
Which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵? A. Titanium (Ti) B. Chromium (Cr) C. Sulfer (S) D. Selenium (Se)
D. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d⁴
Which is the correct electron configuration for the element molybdenum (Mo)? A. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁴ B. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4d¹⁰ 4p⁶ 5s² 5d⁴ C. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s⁶ D. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d⁴
A. Si (one dot on top, right, bottom, left)
Which is the correct electron dot diagram for the element silicon (Si)? A. Si (one dot on top, right, bottom, left) B. Si (all eight filled in) C. Si (one dot on top and right) D. Si (two dots on left and right)
D. 3
Which is the correct number of valence electrons in the element gallium (Ga)? A. 13 B. 31 C. 1 D. 3
Hund's rule
Which rule for filling orbitals in the element Phosphorus is being violated in the orbital diagram shown? Justify your answer.
C. Rutherford
Which scientist described a positively charged core ("nucleus") in the middle of a lot of empty space A. Chadwick B. Thomson C. Rutherford D. Bohr
B. Thomson
Which scientist described an atom made of a solid positively charged substance with electrons dispersed? A. Chadwick B. Thomson C. Rutherford D. Bohr
A. Chadwick
Which scientist described the existence of the neutron? A. Chadwick B. Thomson C. Rutherford D. Bohr
D. Atoms 1 & 4
Which two are isotopes of one another? A. Atoms 1 & 2 B. Atoms 2 & 3 C. Atoms 1 & 3 D. Atoms 1 & 4
C. d
Which type of orbital is shown? A. s B. p C. d D. f
67/27 Co
Write the chemical symbol for the isotope Cobalt with 37 neutrons.
Na: [Ne] 3s¹ (one dot on top) O: [He] 2s² 2p⁴ (two dots on top and left / one dot on bottom and right)
Write the noble gas form of the electron configuration and dot diagram of sodium and oxygen?
