| Questions |
Answer |
Explanations |
| 31. Which of these types of nuclear
radiation has the greatest penetrating power?
A. alpha
B. beta
C. neutron
D. gamma
|
D |
gamma strongest
beta than alpha |
| 32.Alpha particles and beta particles
differ in
A. mass, only
B. charge, only
C. both mass and charge
D. neither mass nor charge
|
C |
alpha helium nucleus
(+) mass 4
beta electron (-) mass almost 0 |
33. Given the nuclear reaction:
This reaction is an example of
A. fission
B. fusion
C. artificial transmutation
D. natural transmutation
|
D |
naturat
transmutation 1 reactant
artifical transmutation 2
reactants
element change is transmutation |
| 34. As two chlorine atoms combine to form
a molecule, energy is
A. absorbed
B. released
C. created
D destroyed
|
B |
making a bond exo
breaking endo
|
| 35. In most aqueous reactions as
temperature increases, the effectiveness of collisions
between reacting particles
A. decreases
B. increases
C.remains the same
|
B |
higher temperatures
faster molecules more effective collisions |
| 36. What is the total number of neutrons
in an atom of an element that has a mass number of 19
and an atomic number of 9?
A. 9
B. 10
C. 19
D. 28
|
B |
neutrons=mass number
(p +n) - atomic number (p) |
| 37. The element in Period 4 and Group 1 of
the Periodic Table would be classified as a
A. metal
B. metalloid
C. nonmetal
D. noble gas
|
A |
potassium is a metal |
| 38. As the elements in Period 2 of the
Periodic Table are considered in succession from left to
right, there is a decrease in atomic radius with
increasing atomic number. This may best be explained by
the fact that the
A. number of protons increases, and the number of
shells of electrons remains the same
B. number of protons increases, and the number of shells
of electrons increases
C. number of protons decreases, and the number of shells
of electrons remains the same
D. number of protons decreases, and the number of shells
of electrons increases
|
A |
the number of shells
remains constant and the protons increase in number.
This pulls the electrons closer to the nucleus. |
| 39. Given the balanced equation:
What is the total number of moles of O2(g) that must
react completely with 5.00 moles of C4H10(g)?
A. 10.0
B. 20.0
C. 26.5
D. 32.5
|
D |
set up a proportion
using the balanced equation
5 moles C4H10(g)
is to 2 C4H10
as X moles of O2 is
to 13 O2
5/2 = X/13 |
| 40. Which particle has the same electron
configuration as a potassium ion?
A. fluoride ion
B. sodium ion
C. neon atom
D. argon atom |
D |
a potassium ion has
18 electrons
just like argon |