Question :
31)In which of the following sequences of elements do all : 1309567
31)In which of the following sequences of elements do all members of the sequence have chemical symbols starting with the same letter?
a)sulfur, silicon, sodium
b)gold, silver, aluminum
c)potassium, phosphorus, lead
d)more than one correct response
e)no correct response
32)Which of the following statements concerning the chemical symbols for the elements is correct?
a)All chemical symbols start with the first letter of the element’s English name.
b)Most elements have two-letter chemical symbols.
c)Synthetic elements have one-letter symbols and naturally-occurring elements have two-letter symbols.
d)More than one correct response.
e)No correct response.
33)Which of the following pairings of terms/concepts is correct?
a)atom; limit of physical subdivision
b)molecule; limit of chemical subdivision
c)compound; homoatomic molecule
d)more than one correct response
e)no correct response
34)In which of the following pairs of chemical formulas do both members of the pair have the same number of atoms per molecule?
a)NaSCN and H2CO3
b)CoCl2 and COCl2
c)H3N and NH3
d)more than one correct response
e)no correct response
35)In which of the following sequences of chemical formulas do all members of the sequence fit the description “heteroatomic and triatomic”?
a)HCN, H2O and O3
b)CO2, NO2 and N2O
c)S2O, SO2, and SO3
d)more than one correct response
e)no correct response
Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices.
a) All three statements are true.
b) Two of the three statements are true.
c) Only one of the statements is true.
d) None of the statements is true.
36)Statements:
(1) No more than two visibly distinct phases may be present in a homogeneous mixture.
(2) Elements are chemically rather than physically combined in a compound.
(3) A common characteristic for both solids and liquids is a definite volume.
a)All three statements are true.
b)Two of the three statements are true.
c)Only one of the statements is true.
d)None of the statements is true.
37)Statements:
(1) The determination of a physical property of a substance causes no change in the identity of the substance.
(2) Matter is anything that has mass, occupies space, and can be seen by the naked eye.
(3) The two most abundant elements in the Earth’s crust are oxygen and carbon.
a)All three statements are true.
b)Two of the three statements are true.
c)Only one of the statements is true.
d)None of the statements is true.
(1) A basis for distinguishing between an element and a compound is whether the substance can be decomposed into other substances using chemical means.
(2) Current chemical theory strongly suggests that all naturally occurring elements have been identified.
(3) The elements silver, gold, and aluminum all have chemical symbols that start with the letter A.
a)All three statements are true.
b)Two of the three statements are true.
c)Only one of the statements is true.
d)None of the statements is true.
39)Statements:
(1) The first letter in a chemical symbol is always the same as the first letter in the element’s name.
(2) Two element’s account for over 75 percent of the atoms in the Earth’s crust.
(3) The limit of chemical subdivision for a compound is a molecule.
a)All three statements are true.
b)Two of the three statements are true.
c)Only one of the statements is true.
d)None of the statements is true.
40)Statements:
(1) The classification “triatomic molecule” denotes molecules in which three different elements are present.
(2) Common physical properties for a substance include color, melting point, boiling point, flammability, and hardness.
(3) The chemical formulas HN3 and NH3 represent two ways for denoting the same compound.
a)All three statements are true.
b)Two of the three statements are true.
c)Only one of the statements is true.
d)None of the statements is true.
