Atomic Theory
What is the charge of the nucleus in an atom of oxygen-17?
+8
A student tested a 0.1 M aqueous solution and made the following
observations:
• Conducts electricity
• Turns blue litmus red
• Reacts with Zn(S) to produce gas bubbles
Which compound could be the solute in this solution?
(1) CH3OH (3) HBr
(2) LiBr (4) LiOH
HBr
For a given reaction, adding a catalyst increases the rate of the
reaction by
alternate pathway, lower activation energy
At STP, which element is brittle and not a conductor of electricity?
(1) S (2) K (3) Na (4) Ar
S
The compounds CH3OCH3 and CH3CH2OH are isomers of each other.
These two compounds must have the same
(1) density (3) melting point
(2) reactivity (4) molecular formula
4
How many electrons are contained in an Au3+ ion?
76
A dilute, aqueous potassium nitrate solution is best qualified as a
(1) homogeneous compound
(2) homogeneous mixture
(3) heterogeneous compound
(4) heterogeneous mixture
2
A 1.0-gram piece of zinc reacts with 5 milliliters of HCl(aq). Which of
these conditions of concentration and temperature would produce the
greatest rate of reaction?
(1) 1.0 M HCl(aq) at 20.oC (2) 1.0 M HCl(aq) at 40.oC
(3) 2.0 M HCl(aq) at 20.oC (4) 2.0 M HCl(aq) at 40.oC
4
What is the formula of titanium(II) oxide?
TiO
Which radioisotope is used in medicine to treat thyroid disorders?
Iodine 131
Atoms of different isotopes of the same element differ in their total number of
Neutrons
Which ion is the only negative ion present in an aqueous solution of an
Arrhenius base?
Hydroxide
Helium is most likely to behave as an ideal gas when it is under what conditions
low pressure and high temperature
What is the name of the polyatomic ion in the compound Na2O2?
Peroxide
What is the half-life of sodium-25 if 1.00 grams of a 16.00-gram
sample of sodium-25 remains unchanged after 237 seconds?
59.3 sec
At STP, solid carbon can exist as graphite or as diamond.
These two forms of carbon have ____________ properties and ___________ crystal structures
different, different
Where does oxidation occur in an electrochemical cell?
Anode
Systems in nature tend to undergo changes toward _________ energy & _________ entropy
lower, more
A metal, M forms an oxide compound with the general formula M2O. In
which group on the Periodic Table could metal M be found?
1
In a nuclear fusion reaction, the mass of the products is less than the mass of the reactants because
some of the mass
has been converted to energy.
In the wave-mechanical model, an orbital is a region of space in an atom where there is
a high probability of finding an electron
Conductivity in a metal results from the metal atoms having
highly mobile electrons in the valence shell
Daily Double: The kinetic molecular theory assumes that the particles of an ideal gas: List all 5 - to double your lives
1: No mass
2: Negligible volume
3: No attractive forces
4: Random, straight line motion
5: Elastic collisions
Which type of molecule is CF4? Explain in terms of distribution of charge
Nonpolar, symmetrical distribution of charge
What is the IUPAC name for the compound that has the condensed
structural formula CH3CH2CH2CHO?
Butanal