CHEMISTRY A SEMESTER EXAM
QUESTIONS & VERIFIED RATIONALIZED
ANSWERS 100% GUARANTEE PASS
jTwo samples of solids have similar reactivity with acids and similar densities. Their masses and volumes,
however, are not at all similar. Is it possible that these are the same substance?
No, it is not possible because they have different intensive properties
Yes, it is possible because they have similar intensive properties
No, it is not possible because they have different extensive properties
Yes, it is possible because they have similar extensive properties - Yes, it is possible because they have
similar intensive properties
Melting gold with other metals makes 10-karat gold. Which term best describes 10-karat gold?
Homogeneous mixture
Pure substance
Heterogeneous mixture
Compound - Homogeneous mixture
How do chemists predict the shapes of molecules?
, Due to the repulsion between electrons, valence electrons will be arranged as far apart from each other
as possible
Chemists can't predict the shape of molecules, because the attractive forces between valence electrons
are unpredictable
Due to the repulsion between electrons, valence electrons will be arranged as close to each other as
possible
Due to the attraction between electrons, valence electrons will be arranged as close to each other as
possible - Due to the repulsion between electrons, valence electrons will be arranged as far apart from
each other as possible
Lead has an atomic number of 82. Which statement describes all neutral atoms and ions of lead?
Neutral atoms of lead must have 82 electrons. Ions must have 82 electrons, as well
Neutral atoms of lead must have 82 protons, but ions have more or fewer
Neutral atoms of lead must have 82 protons. Ions must have 82 protons, as well
Neutral atoms of lead must have 82 neutrons, but ions have more or fewer - Neutral atoms of lead must
have 82 protons. Ions must have 82 protons, as well
How did the study of the atom contribute to our understanding of the periodic table and of the
elements?
Elements are made of atoms, so understanding atoms provided information about elements, which led
to the organization of the periodic table
The determination of electron charge led to an understanding of how atoms interact with one another,
which facilitated the organization of the periodic table
QUESTIONS & VERIFIED RATIONALIZED
ANSWERS 100% GUARANTEE PASS
jTwo samples of solids have similar reactivity with acids and similar densities. Their masses and volumes,
however, are not at all similar. Is it possible that these are the same substance?
No, it is not possible because they have different intensive properties
Yes, it is possible because they have similar intensive properties
No, it is not possible because they have different extensive properties
Yes, it is possible because they have similar extensive properties - Yes, it is possible because they have
similar intensive properties
Melting gold with other metals makes 10-karat gold. Which term best describes 10-karat gold?
Homogeneous mixture
Pure substance
Heterogeneous mixture
Compound - Homogeneous mixture
How do chemists predict the shapes of molecules?
, Due to the repulsion between electrons, valence electrons will be arranged as far apart from each other
as possible
Chemists can't predict the shape of molecules, because the attractive forces between valence electrons
are unpredictable
Due to the repulsion between electrons, valence electrons will be arranged as close to each other as
possible
Due to the attraction between electrons, valence electrons will be arranged as close to each other as
possible - Due to the repulsion between electrons, valence electrons will be arranged as far apart from
each other as possible
Lead has an atomic number of 82. Which statement describes all neutral atoms and ions of lead?
Neutral atoms of lead must have 82 electrons. Ions must have 82 electrons, as well
Neutral atoms of lead must have 82 protons, but ions have more or fewer
Neutral atoms of lead must have 82 protons. Ions must have 82 protons, as well
Neutral atoms of lead must have 82 neutrons, but ions have more or fewer - Neutral atoms of lead must
have 82 protons. Ions must have 82 protons, as well
How did the study of the atom contribute to our understanding of the periodic table and of the
elements?
Elements are made of atoms, so understanding atoms provided information about elements, which led
to the organization of the periodic table
The determination of electron charge led to an understanding of how atoms interact with one another,
which facilitated the organization of the periodic table
