1. Define and predict trends in atomic
radii, ionic radii, ionization energy and electron affinity by
using the periodic table.
2. Differentiate between ionization
energy and electron affinity
3. Place the following atoms in order
of increasing atomic radius: N, O, P, Ge
Describe the ionization mechanisms for (a) electron impact (EI)
ionization, (b) chemical ionization (CI), (c) electrospray
ionization (ESI), and (d) atmospheric-pressure chemical ionization
(APCI).
1) The ionization energy of an atom is the energy
required to remove an electron from the atom in the gaseous
state.
Arrange the following elements in order of decreasing ionization
energy.
molybdenum
silver
germanium
phosphorus
strontium
2)
The metallic character of an element is defined as the
properties typical of a metal, especially the tendency to lose
electrons in chemical reactions.
Arrange the following elements in order of decreasing metallic
character.
F
Cr
P
Zn
Ca
Cs
S
(a) How does the electron microscopy work? Explain briefly
(b) What are the differences between Scanning Electron
Microscopy (SEM) and Transmission Electron Microscopy (TEM)?
Which of the following statements is false?
Electron affinity is a measure of the energy evolved when a
gaseous atom gains an electron
Anions are smaller than the parent atoms from which they are
derived
Ionization energies decrease as the atomic radius
increases
For isoelectronic cations, the higher the charge, the smaller
the ion
Cations are smaller than the parent atoms from which they are
derived
Ionization energy is the energy needed to eject an electron from
an atom or ion. Calculate the ionization energy, IE, of the
one-electron ion Be3 . The electron starts in the lowest energy
level, n=1.
Topic 7: Cardiac action potential.
Define and describe the differences in the location and
function of cardiac autorhythmic and contractile cells. in detail
draw and describe the action potential of these two cell types of
making sure to include
Voltages At which important events occur
Resting membrane potential
Threshold potential
Peak of the action potential
Repolarization and hyperpolarization phase
types of different ion channels and their state
throughout
When do they open and close?
What ions are moving where and...
Please show work!!
On an atomic level, when the electron relaxes from a higher
energy level (n=4) to a lower energy level, a photon with the
wavelength of 485nm is released. Determine the lower energy level,
to which the electron relaxes.