ACS Final Review Flashcards
What determines atomic number? What does that mean?
Number of positively charged protons in the nucleus. Emission of any charged particle would change the atomic number.
Define paramagnetic
atoms with unpaired electrons
When n goes from 4 to 2 is energy being absorbed or released?
absorbed
When n goes from 2 to 3 is energy being absorbed or released?
released
Energy must be ________ by the atom for an electron to move from one energy state in an atom to another energy state that is more remote from the nucleus.
absorbed
Define Inert Gas
Noble Gas
A sodium ion differs from a sodium atom in that the sodium ion
has fewer electrons.
In effecting nuclear changes by bombarding target nuclei with positively charged alpha particles, it is necessary to accelerate these particles to high speed because it is necessary to…
A) Drive the positive particles through the electron cloud
B) overcome the force of repulsion of the nucleus.
C) focus the bombarding particle more accurately.
D) strip electron from the atom.
B) overcome the force of repulsion of the nucleus
The existence of discrete (quantized) energy levels in an atom may be inferred from…
atomic line spectra
Helium has two electrons in the 1s orbital. When it becomes slightly ionized, forming He+,
A) its spectrum resembles that of the hydrogen spectrum
B) the remaining electron is easier to move
C) the nuclear charge has decreased by one
D) it has lost one atomic mass unit
A) its spectrum resembles that of the hydrogen spectrum
The structure of CO3^2- ion can be described in the Lewis formulation by these structures. This means that . . .
A) two carbon to oxygen bonds are single bonds; the third is a double bond
B) three independent forms of CO3^2- ion coexist in equilibrium
C) the electrons must be rapidly exchanging among the three forms
D) the CO3^2- ion exists only one form: an average of the three principal structures shown.
D) the CO3^2- ion exists only one form: an average of the three principal structures shown.
Which concept describes the formation of four equivalent, single, covalent bonds by carbon in its compounds that resemble methane, CH4?
Hybridization
Define hybridization:
a mixing of the native orbitals on a given atom to form special atomic orbitals for bonding.
Define coordinate covalent bonding:
a metal–ligand bond resulting from
the interaction of a Lewis base (the ligand) and a Lewis acid
(the metal ion).
The fact that Pt(NH3)2Cl2 exists in two different isomeric forms offers evidence that the geometry is A) octahedral B) square planar C) tetrahedral D) trigonal planar
B) square planar
