Chemistry Chapter Two
How many photons of light with frequency 5.50 × 1015 Hz are required to provide 1 kJ of energy?
a)2.74 × 10^20 photons
b)4.56 × 10^–4 photons
c) 1.65 × 10^44 photons
d) 3.64 × 10^–18 photons
e) 3.64 × 10^–16 photons
What is the energy in joules of the 656 nm spectral line of hydrogen.
a)1.45 × 10^–48 J
b) 1.30 × 10^–22 J
c) 3.03 × 10^–19 J
d) 3.03 × 10^–28 J
e) 4.35 × 10^–31 J
Calculate the wavelength, in meters, of light absorbed by an electron in an atom of hydrogen as it moves from energy level n = 3 to n = 6.
a) 8.22 × 10^–7 m
b) 1.09 × 10^–6 m
c) 3.28 × 10^–6 m
d) 1.65 × 10^–11 m
e) 1.83 × 10^–7 m
What is the wavelength of a ball that is 25.0 g traveling at 90.0 miles per hour (40.2 m/s)?
a) 1.07 × 10^–30 m
b) 2.42 × 10^–11 m
c) 6.59 × 10^–34 m
d) 6.59 × 10^–37 m
e) 4.12 × 10^–37 m
Which of the following is not possible?a) 4d
Which of the following subshells is correctly designated?
Relating Frequency and Wavelength of EM radiation: A dental hygienist uses x-rays (λ = 1.00 Ǻ) to take a series of dental radiographs. What is the frequency of the electromagnetic radiation? (assume the speed of light (c) = 3.00 × 10^8)
3.00 x 10^18 s^-1
The transition elements refer to what group of elements?
B) s-block elements
D) d-block elements
E) p-block elements
Which of the following could never be isoelectronic species?
A) atoms of two different elements
B) anions of two different elements
C) an anion and a cation
D) cations of two different elements
E) an anion and an atom
What is the general valence electron configuration (where n= principal quantum number) that best describes the halogens as a group.
Which of the following has the largest atomic radius?
A is the sequence Na, Mg, Al, Si and P. B is the sequence He, Ne, Ar, Kr, Xe. Which statement below is true?
A) The members of A are decreasing in size.
B) The members of B have larger radii than those of A, respectively. That is He > Na, Ne > Mg, etc.
C) All the members of A are isoelectronic.
D) The members of B are decreasing in size.
E) The members of A have larger radii than those of B, respectively.
Which of the following isoelectronic species has the largest radius?
Choose the species from which one electron could most easily be removed. A) Ca2+
Which of the following elements is likely to have the largest second ionization energy?
Which of the following species is diamagnetic?
Which of the following has the most negative electron affinity: Li, Be, N, O, F?