The answer "e" may be chosen, if no correct answer is present in a, b, c, or d.
 
 

Which of the following statements is not a part of atomic theory? a. chemical change involves a union, separation or rearrangement of atoms b. all atoms of a given type are identical to each other c. only whole atoms can participate in or result from any chemical change d. atoms are considered indestructible during chemical change	Which one of the following statements about atoms is incorrect? a. an atom is the smallest "piece" of an element that can exist and still have the properties of the element b. free isolated atoms are rarely encountered in nature c. atoms may be decomposed using chemical change d. only one kind of atom may be present in a homoatomic molecule
Which one of the following statements about heteroatomic molecules is correct? a. no two atoms in a heteroatomic molecule may be the same b. upon chemical subdivision, heteroatomic molecules always yield two or more kinds of atoms c. heteroatomic molecules maintain the properties of their constituent elements d. molecules of certain elements are heteroatomic	In the formula C12H22O11, the subscript 12 indicates a. the number of grams of carbon in one molecule b. the number of carbon atoms in a molecule c. the percentage by mass of carbon in the molecule d. the atom percent of carbon in the molecule
In which of the following compounds does one molecule of the compound contain 3 elements and 8 atoms? a. C3H8 b. B2H6 c. S4N3Cl d. POCl3	The total number of atoms present in one formula unit of Al2(SO4)3 is a. 14 b. 15 c. 16 d. 17
Which of the following pairs of subatomic particles have charges of equal magnitude but opposite in sign? a. electron and neutron b. neutron and proton c. proton and electron d. proton and positron	Which of the following sequences gives a correct listing of the fundamental subatomic particles in order of increasing mass? a. proton, neutron, electron b. electron, proton, neutron c. neutron, electron, proton d. proton, electron, neutron
The nucleus of an atom a. contains all protons and electrons b. is negatively charged because of the presence of electrons c. is neutral since it contains only neutrons d. accounts for only a small amount of the total volume of an atom	Atoms are neutral because a. all atoms contain neutrons b. all subatomic particles lose their charges once they enter an atom c. equal numbers of protons and neutrons are present d. the number of subatomic particles in the nucleus is always an even number
Which of the following was not a conclusion obtained from the gold foil alpha  particle scattering experiment? a. an atom is mostly empty space b. an atom's nucleus is positively charged c. an atom's nucleus contains protons and neutrons d. most of the mass of an atom is concentrated in its nucleus	An atom contains 26 protons, 30 neutrons and 26 electrons. The atomic number and mass number for this atom are, respectively, a. 30 and 26                               b. 26 and 30                               c. 26 and 56  d. 30 and 56
All atoms of a given element must have the same         a. mass number b. atomic number c. number of neutrons d. number of nucleons	Isotopes of a given element a. have the same mass number but different numbers of protons b. have different mass numbers but identical numbers of protons c. have the same atomic number but different chemical properties d. have the same mass number but different chemical properties
The total number of subatomic particles present in an atom is given by the a. atomic number b. mass number c. mass number + atomic number d. mass number - atomic number	How many electrons are present in 10 molecules of CO2? a. 107 b. 189 c. 220 d. 440
Which of the following properties for the most abundant isotope of an element would not be possessed by the second most abundant isotope of the same element? a. boiling point is 2403 degrees, C. b. atomic number is 31 c. isotopic mass is 69.92 amu d. reacts with chlorine to give the compound XCl2	Two naturally occurring isotopes exist for the hypothetical element dippium.  30.0% of dippium atoms have a relative mass of 6.0 amu and 70.0% a relative mass of 8.0 amu. What is the atomic mass of dippium? a. 6.8 amu b. 7.2 amu c. 7.4 amu d. 14.0 amu
Element A exists in three isotopic forms with masses of 21.0, 25.0 and 26.0 amu respectively. Element B also exists in three isotopic forms with masses of 22.0, 24.0 and 26.0 amu respectively. It is true that a. element A has a higher atomic mass than B b. element B has a higher atomic mass than A c. A and B have identical atomic masses since the sums of their isotopic masses are equal d. you cannot predict which atomic mass is greater from the data given	The hypothetical element supposium exists in four isotopic forms. The relative masses and percentage abundance for these four isotopes are, respectively, 12.0 amu and 27.3% 15.0 amu and 31.3% 13.0 amu and 13.7% 17.0 amu and 27.7% The atomic mass of supposium is: a. 13.5 b. 14.0 c. 14.25 d. 14.47