CLEP US HISTORY ONE EXAM 2024
COMPREHENSIVE QUESTIONS AND
VERIFIED ANSWERS 5 COPIES
◉ Planck's constant. Answer: 6.63 x 10^-34 Jxsec
◉ alpha particle. Answer: 4/2 He
◉ beta particle. Answer: 0/-1e
◉ positron particle. Answer: 0/+1e
◉ gas constant (R). Answer: 8.31 J/Kmol
◉ Average Kinetic Energy. Answer: AvgKE=3/2nRT
◉ Partial Pressure of Gas. Answer: Pa x ntot = Ptot x na
◉ Ideal Gas Law (density). Answer: P(mm)=RT
◉ gas constant (R) in atm. Answer: 0.082 L atm / K mol
◉ atomic theory. Answer: (Dalton's 1800)
,1) All matter is made of atoms. Atoms are indivisible and indestructible.
2) All atoms of a given element are identical in mass and properties
3) Compounds are formed by a combination of two or more different
kinds of atoms.
4) A chemical reaction is a rearrangement of atoms.
◉ Evidence for the atomic theory - Gold foil experiment. Answer:
Ernest Rutherford expected the beam he shot to go right through;
1/8,000 of them would bounce back. Thus, there is something very
small, dense, and positively charged in a atom along with a lot of empty
space.
◉ atomic structure. Answer: Protons and Neutrons form the nucleus of
the atom, electrons orbit the nucleus in electron shells.
◉ atomic spectra. Answer: all elements, when heated release specific
frequencies of electromagnetic radiation (colors of light) unique to that
particular element
◉ quantum numbers. Answer: These specify the properties of atomic
orbitals and the properties of electrons in orbitals - describes the energy
and place of an electron. n=
◉ atomic orbitals. Answer: These are the regions around the nucleus
where the electrons typically are; (s, p, d, f orbitals) they have different
shapes
, ◉ Mass number. Answer: This is the # of Protons + # of Neutrons
◉ atomic number. Answer: This is the # of Protons
◉ Isotopes of an element. Answer: These are atoms with same atomic
number but different mass number AKA same number of protons,
different number of neutrons
have similar chemical properties as counterparts, but have different
physical properties (mass/density) and radioactivity.
◉ mass spectrometry. Answer: A technique used by toxicologist to
identify chemical compositions. The instrument breaks a chemical down
into its ions and accelerates them in a magnetic field that produces a
unique spectrum to discover the masses of atoms and percentages of
isotopes
◉ down, electrons, nucleus, decreases, increases, largest. Answer: as
you go [x] periodic table, atomic radius increases because [x] are farther
away from the [x].
As you go LEFT--> RIGHT, atomic radius [x] because effective nuclear
charge [x].
Fr has the [x] radius.
COMPREHENSIVE QUESTIONS AND
VERIFIED ANSWERS 5 COPIES
◉ Planck's constant. Answer: 6.63 x 10^-34 Jxsec
◉ alpha particle. Answer: 4/2 He
◉ beta particle. Answer: 0/-1e
◉ positron particle. Answer: 0/+1e
◉ gas constant (R). Answer: 8.31 J/Kmol
◉ Average Kinetic Energy. Answer: AvgKE=3/2nRT
◉ Partial Pressure of Gas. Answer: Pa x ntot = Ptot x na
◉ Ideal Gas Law (density). Answer: P(mm)=RT
◉ gas constant (R) in atm. Answer: 0.082 L atm / K mol
◉ atomic theory. Answer: (Dalton's 1800)
,1) All matter is made of atoms. Atoms are indivisible and indestructible.
2) All atoms of a given element are identical in mass and properties
3) Compounds are formed by a combination of two or more different
kinds of atoms.
4) A chemical reaction is a rearrangement of atoms.
◉ Evidence for the atomic theory - Gold foil experiment. Answer:
Ernest Rutherford expected the beam he shot to go right through;
1/8,000 of them would bounce back. Thus, there is something very
small, dense, and positively charged in a atom along with a lot of empty
space.
◉ atomic structure. Answer: Protons and Neutrons form the nucleus of
the atom, electrons orbit the nucleus in electron shells.
◉ atomic spectra. Answer: all elements, when heated release specific
frequencies of electromagnetic radiation (colors of light) unique to that
particular element
◉ quantum numbers. Answer: These specify the properties of atomic
orbitals and the properties of electrons in orbitals - describes the energy
and place of an electron. n=
◉ atomic orbitals. Answer: These are the regions around the nucleus
where the electrons typically are; (s, p, d, f orbitals) they have different
shapes
, ◉ Mass number. Answer: This is the # of Protons + # of Neutrons
◉ atomic number. Answer: This is the # of Protons
◉ Isotopes of an element. Answer: These are atoms with same atomic
number but different mass number AKA same number of protons,
different number of neutrons
have similar chemical properties as counterparts, but have different
physical properties (mass/density) and radioactivity.
◉ mass spectrometry. Answer: A technique used by toxicologist to
identify chemical compositions. The instrument breaks a chemical down
into its ions and accelerates them in a magnetic field that produces a
unique spectrum to discover the masses of atoms and percentages of
isotopes
◉ down, electrons, nucleus, decreases, increases, largest. Answer: as
you go [x] periodic table, atomic radius increases because [x] are farther
away from the [x].
As you go LEFT--> RIGHT, atomic radius [x] because effective nuclear
charge [x].
Fr has the [x] radius.
