What are the numbers of protons, neutrons, and electrons in an isotope of titanium with a mass number of 50?
A. 22 p, 22 n, 28 e
B. 28 p, 22 n, 22 e
C. 50 p, 22 n, 50 e
D. 22 p, 28 n, 22 e
100
D. The total number of protons and the total number of electrons in the atom
What can be determined if only the atomic number of an atom is known?
A. the total number of neutrons in the atom, only
B. the total number of protons in the atom, only
C. the total number of protons and the total
number of neutrons in the atom
D. the total number of protons and the total
number of electrons in the atom
100
2g/ml
A cube contains 20 mL of a solution. The solution has a mass of 40 grams. What is the density in g/mL of this solution?
100
Gamma, Beta, Alpha
The three main types of nuclear radiation
are alpha, beta, and gamma. List the three types of radiation from highest penetrating power to lowest penetrating power?
100
B. CS₂ + 3Cl₂ → CCl₄ + S₂Cl₂
Which of the following chemical
equations is balanced correctly?
A. C₆H₆ + O₂ → 2CO₂ +3H₂O
B. CS₂ + 3Cl₂ → CCl₄ + S₂Cl₂
C. B₂O₃ + 2C → B₄C + CO
D. Cl₂ + NaI → 2NaCl + I₂
200
A. 88
How many protons are in an atom represented by ₈₈²²⁰Ra
A. 88
B. 132
C. 220
D. 308
200
They have six valence electrons
How many valence electrons are there in the elements in family 16 of the periodic table?
200
D. It is difficult to dispose of wastes.
What is a problem commonly associated with nuclear power facilities?
A. A small quantity of energy is produced.
B. Reaction products contribute to acid rain.
C. It is impossible to control nuclear fission.
D. It is difficult to dispose of wastes.
200
+ 2
Under certain conditions, solid magnesium
(Mg) and solid sulfur (S) can combine and
form magnesium sulfide (MgS). The
Equation for thisreaction is shown below.
Mg(s) +S(s) → MgS(s)
What is the oxidation
number for Mg in MgS in this reaction?
300
C. Electrons
What are shared in covalent bonds?
A. Cations
B. Protons
C. Electrons
D. Anions
300
C. Si
Which element has both metallic and nonmetallic properties?
A. Rb (3) Si
B. Rn
C. Si
D. Sr
300
D. Their motion gradually decreases and eventually stops.
Which of these statements describes
what happens to the molecules of a solid
as the temperature is lowered to absolute
zero?
A. They begin to take up more space.
B. They become farther apart.
C. Their kinetic energy gradually increases to a maximum.
D. Their motion gradually decreases and eventually stops.
300
more stable
The final elements produced by radioactive decay differ from the original radioactive elements because the nuclei of the final elements are always
A. more stable.
B. increased in mass.
C. half as radioactive.
D. positively charged.
300
Metals and nonmetals
Within ionic bonds, electrons are transferred what two categories of elements?
400
Neutrons
When compared to sulfur-32, sulfur-34 has more —
400
3
How many valence electrons does the unknown metal have using the information below?
UNKNOWN METAL M
Most common salts
MP3
M 2 O3
MCl 3
400
B. A solid changing to a gaseous phase
Which of these best describes sublimation?
A. A solid changing to a liquid phase
B. A solid changing to a gaseous phase
C. A gas filling the space in its container
D. A liquid taking the shape of its container
400
C. 4.16s
An original sample of the radioisotope
fluorine-21 had a mass of 80.0 milligrams. Only 20.0 milligrams of this original sample remain unchanged after 8.32 seconds. What is the half-life of fluorine-21?
A. 1.04 s
B. 2.08 s
C. 4.16s
D. 8.32 s
400
B. inversely proportional
The relationship between the pressure and volume of a gas at constant temperature is
A. numerically equivalent
B. inversely proportional
C. positively correlated
D. totally unrelated
500
D. NO
Which compound has a covalent bond?
A. CaI 2
B. KBr
C. NaCl
D. NO
500
an ion with a charge of + 2
(a cation)
A particle has 36 electrons,
49 neutrons, and 38 protons.
What type of particle is it and what is
its charge?
500
C. The average distance between molecules increases.
Which of the following is not true of a sample of gas as it is heated in a rigid, closed container?
A. The pressure of the molecules increases.
B. The average speed of the molecules increases.
C. The average distance between molecules increases.
D. The number of collisions between molecules increases.
500
Neptunium (Atomic # 93) and Curium (Atomic # 96)
What is the daughter nuclei of the element Americium with a atomic mass of 243 and an atomic number of 95 after alpha radiation and beta radiation?
500
Double Displacement
What type of chemical reactions results in the postive ion of one compound replacing the positive ion of the other to form two new compounds?