Unit 3 Flashcards
How many valence electrons does Calcium have?
2 It’s in Group 2.
How many valence electrons does Bromine have?
7 It’s in Group 17.
How many valence electrons does Helium have?
2
How many valence electrons does Neon have?
8
Which element, Xenon or Lithium, has a full outer shell of electrons?
Xenon; it is a noble gas, group 18
Which has the highest electronegativity, Neon or Oxygen?
Oxygen. Reason: Neon is a noble gas and thus has 0 electronegativity.
Which has the highest ionization energy, Mg or Sr?
Mg Ionization decreases as it goes down the group.
Which has a smaller atomic radius, Ag or Xe?
Xe Atomic radius decreases across the period from left to right.
Which has a smaller ionic radius, Li or Li+?
Li+
Which has a smaller ionic radius, F or F-?
F
Elements in the same group have the same number of _____ ______.
valence electrons
What is the most important characteristic in determining an element’s chemical properties?
the number of valence electrons it contains
Which group will have an electron configuration that ends in s²?
Alkaline Earth metals
What element is this electron configuration showing, 1s²2s²2p⁶3s²3p⁶4s²3d⁶?
Fe
Which element is this showing, [Ar]1s¹?
K
Which property describes how much energy must be added to an atom to remove an outermost electron?
Ionization energy
Which element has the highest atomic radius?
Fr
Which group is the noble gases?
Group 18
Which element has the highest electronegativity?
F
The majority of transition metals are in which block? s,p,d, or f
d
Unknown element X has 5 energy levels, 5 valence electrons, and is a metalloid. What is X?
Sb
The main energy level that can hold only two electrons is the _____.
first level
Which element has the greatest electron affinity?
F
Which of the following (UV light, radio waves, x-rays, gamma rays) has a longer wavelength?
radio waves
Which of the following (UV light, radio waves, x-rays, gamma rays) has a higher frequency?
gamma rays
What is the order of visible light from lowest to highest frequency?
ROY G BV red orange yellow green blue violet
Element X has many of the same physical and chemical properties as Mg and Sr but has a lower atomic mass? Is it Na or Be?
Be
Elements in the same _____ have chemical properties that are the most similar.
group
Which element (Co or Cd) has 10 electrons in the d orbital?
Cd
What is the frequency of light with a wavelength of 2.00 x 10⁻⁸m?
speed of light /wavelength = frequency (3.00x10⁸m/s)/(2.00x10⁻⁸m)= 1.50x10¹⁶Hz
What is the wavelength in m of a photon that has an energy of 2.2 x 10⁻²⁰J?
(Plancks constant)(speed of lite)/Energy=wavelength (6.63x10⁻³⁴Js)(3.0x10⁸m/s)/(2.2x10⁻²⁰J)=9.0x10⁻⁶m
What is the frequency of a photon with energy of 2.0x10⁻²⁵J?
(energy)/(Plancks constant)=frequency (2.0x10⁻²⁵J)/(6.63x10⁻³⁴Js)=3.0x10⁸Hz
Find the energy of a photon with a frequency of 5.0x10¹⁴Hz.
(Planck’s constant)(frequency)=energy (6.63x10⁻³⁴Js)(5.0x10¹⁴Hz) = 3.3x10⁻¹⁹J
Find the frequency of a photon with a wavelength of 5.0x10⁻⁷m.
(speed of light)/(wavelength)=frequency (3.0x10⁸m/s)/(5.0x10⁻⁷m)=6.0x10¹⁴Hz
Label a wave with trough, crest, wavelength. and amplitude.
What is the orbital diagram for Nitrogen?
