CH9 HMW CHEM 139
Identify the color of visible light of the electromagnetic spectrum where the wavelength measurement is 450 nm is found.
Blue
Which of the following radii comparisons is correct? A) N^3- < N B) Ti^4+ > Ti^3+ C) In^3+ < In^+ D) C^4+ > C^4- E) As^3- < As^3+
C) In^3+ < In^+
Which of these statements is true concerning the following reaction? Na(g) → Na⁺(g) + e⁻. A) The energy required is the electron affinity B) The reaction is exothermic C) Na^+(g) is an anion D) This is an ionization process
D) This is an ionization process
Which of the following metals would be expected to have the smallest atomic radius? A) Cesium (Cs) B) Barium (Ba) C) Lanthanum (La) D) Europium (Eu) E)Tantalum (Ta)
E)Tantalum (Ta)
The energy released in the reaction F(g) + e⁻ → F⁻(g) is known as the
Electron affinity
Rank the following atoms in order of decreasing first ionization energies (i.e., highest to lowest): Li, Be, Ba, F.
F > Be > Li > Ba
Which periodic trend quantifies the amount of energy required to remove an electron from a neutral, gaseous atom?
Ionization Energy
Which subatomic particle is found in the nucleus and has no charge?
Neutron
Rank the following atoms in order of increasing size (i.e., smallest to largest): Li, Al, Be, Ba, O.
O < Be < Li < Al < Ba
Which subatomic particle is found in the nucleus and has a positive charge?
Proton
Which two particles of the atom have nearly identical masses?
Proton and neutron
The nucleus of an atom contains?
Protons and neutrons
Rank the following atoms in order of increasing first ionization energies (i.e., lowest to highest): Rb, F, Mg, B, N.
Rb < Mg < B < N < F
Energy of a photon is ______ proportional to frequency, and _______ proportional to wavelength.
directly, inversely
The net charge on an atom of a given element changes as ______ are added or removed.
electrons
What is observed when a noble gas is heated and the emitted light shone through a prism?
individual lines of varying colors
What element is theoretically the largest of all on the periodic table?
Francium (Fr)
What type of light on the electromagnetic spectrum has the highest energy per photon?
Gamma waves
Atomic radii decrease from left to right in a period (Na → Ar) on the periodic table. Choose the best explanation for this observed trend.
The nuclear charge increases in that direction.
Light wave A has a greater frequency than light wave B. Which has a greater wavelength?
Wave B
Define wavelength as it relates to a electromagnetic wave.
Wavelength is the distance between two consecutive peaks or troughs in a wave
Red light has a _____ frequency and a _____ wavelength than ultraviolet rays.
lower, longer
How many core electrons does an atom of beryllium (Be) contain?
2
Define frequency as it relates to a electromagnetic wave.
Frequency is the number of wave cycles that pass a specified point in space in a specified amount of time
Rank the following atoms in order of decreasing size (i.e., largest to smallest): Rb, F, Mg, B, N.
Rb > Mg > B > N > F
Halogens tend to form anions because
gaining electrons will fill their octet faster than losing them
