CHEMISTRY: THE MOLECULAR NATURE OF
MATTER AND CHANGE COMPREHENSIVE
SOLVED QUESTIONS AND COMPLETE
ANSWERS
◉ Particles in a solid can only vibrate. In a liquid, they slide against
each other. In a gas, they move freely, bouncing and bumping into
each other.
Answer: Which explanation best compares the movement of
particles in three states of matter?
◉ Element
Answer: Which of the following can't be separated into simpler
substances or converted into another substance by the chemical
process?
◉ Colloid
Answer: Maple syrup, which comes from the sap of maple trees,
contains water and natural sugars. It's a clear, brown liquid and the
sugars can't be separated by filtration. Under which category will
you classify it?
,◉ Whether the particles remain suspended for a extended period of
time.
Answer: Which criteria is responsible for deciding whether a
heterogeneous mixture is a colloid or a suspension?
◉ The molecular structure has changed?
Answer: Which of the following is an indication that a substance has
undergone a chemical change?
◉ These are the physical changes water undergoes.
Answer: Water is colorless and odorless liquid. It can exist in solid,
liquid, and gas states. it can boils at 100 degrees C and melts at 0
degrees C, Which option best describes this information?
◉ Water boiling
Answer: Which process is a physical change?
◉ It does not change the chemical composition of water
Answer: Why is melting of ice a physical change?
◉ Wood burning
Answer: Which is a chemical change?
,◉ Orbital
Answer: In the modern quantum-based atomic theory, what is the
name given to a particular space around the nucleus in which an
electron moves?
◉ Neutron
Answer: Which subatomic particle is electronically neutral and
found in the nucleus of an atom?
◉ Thomson
Answer: Which scientist performed the cathode ray experiment
leading to the discovery of electrons?
◉4
Answer: For an atoms's electrons, how many energy sub levels are
present are present in the principal energy level n=4?
◉ Atom
Answer: What is the basic unit of all matter?
◉ Calculate this by adding together the weights of each isotope
based on their abundance.
, Answer: Carbon exists in nature as three isotopes. Given the atomic
mass and relative abundance of the isotopes, what is the average
atomic mass of carbon?
◉ Mass number
Answer: Which atomic property is different in each isotope of an
element?
◉ Atomic mass unit
Answer: Which unit is used for measuring atomic mass?
◉ Oxygen 16 is the most abundant oxygen isotope as it is closest to
the average mass of oxygen
Answer: The average atomic mass of of oxygen us 15.9994 amu. The
atomic masses of its three isotopes are as follows -- 0-16 : 15.995
amu, 0-17: 16.999 amu, 0-18: 17.999 amu. Which isotope is most
likely to have the greatest abundance in nature.
◉ matter
Answer: anything that has mass and occupies space
◉ solid
Answer: A form of matter that has a definite shape and volume
MATTER AND CHANGE COMPREHENSIVE
SOLVED QUESTIONS AND COMPLETE
ANSWERS
◉ Particles in a solid can only vibrate. In a liquid, they slide against
each other. In a gas, they move freely, bouncing and bumping into
each other.
Answer: Which explanation best compares the movement of
particles in three states of matter?
◉ Element
Answer: Which of the following can't be separated into simpler
substances or converted into another substance by the chemical
process?
◉ Colloid
Answer: Maple syrup, which comes from the sap of maple trees,
contains water and natural sugars. It's a clear, brown liquid and the
sugars can't be separated by filtration. Under which category will
you classify it?
,◉ Whether the particles remain suspended for a extended period of
time.
Answer: Which criteria is responsible for deciding whether a
heterogeneous mixture is a colloid or a suspension?
◉ The molecular structure has changed?
Answer: Which of the following is an indication that a substance has
undergone a chemical change?
◉ These are the physical changes water undergoes.
Answer: Water is colorless and odorless liquid. It can exist in solid,
liquid, and gas states. it can boils at 100 degrees C and melts at 0
degrees C, Which option best describes this information?
◉ Water boiling
Answer: Which process is a physical change?
◉ It does not change the chemical composition of water
Answer: Why is melting of ice a physical change?
◉ Wood burning
Answer: Which is a chemical change?
,◉ Orbital
Answer: In the modern quantum-based atomic theory, what is the
name given to a particular space around the nucleus in which an
electron moves?
◉ Neutron
Answer: Which subatomic particle is electronically neutral and
found in the nucleus of an atom?
◉ Thomson
Answer: Which scientist performed the cathode ray experiment
leading to the discovery of electrons?
◉4
Answer: For an atoms's electrons, how many energy sub levels are
present are present in the principal energy level n=4?
◉ Atom
Answer: What is the basic unit of all matter?
◉ Calculate this by adding together the weights of each isotope
based on their abundance.
, Answer: Carbon exists in nature as three isotopes. Given the atomic
mass and relative abundance of the isotopes, what is the average
atomic mass of carbon?
◉ Mass number
Answer: Which atomic property is different in each isotope of an
element?
◉ Atomic mass unit
Answer: Which unit is used for measuring atomic mass?
◉ Oxygen 16 is the most abundant oxygen isotope as it is closest to
the average mass of oxygen
Answer: The average atomic mass of of oxygen us 15.9994 amu. The
atomic masses of its three isotopes are as follows -- 0-16 : 15.995
amu, 0-17: 16.999 amu, 0-18: 17.999 amu. Which isotope is most
likely to have the greatest abundance in nature.
◉ matter
Answer: anything that has mass and occupies space
◉ solid
Answer: A form of matter that has a definite shape and volume
