CHEMICAL PRINCIPLES THE QUEST FOR
INSIGHT CERTIFICATION EVALUATION
EXAMS SET FULL QUESTIONS AND
COMPLETE SOLUTION
●● What determines an element's properties?
Answer: An element's properties depend on the structure of its atoms.
●● What is a compound?
Answer: A compound is a substance consisting of two or more different
elements combined in a fixed ratio.
●● What is the significance of hydrogen bonding in water?
Answer: Hydrogen bonding gives water properties that help make life
possible on Earth.
●● What percentage of the human body is made up of oxygen?
Answer: Oxygen makes up approximately 65.0% of the human body
mass.
●● What are trace elements?
Answer: Trace elements are required by an organism in only minute
quantities, typically less than 0.01% of mass.
,●● What is the role of iron in the human body?
Answer: Iron is a trace element required for the proper functioning of
hemoglobin, the molecule that carries oxygen in red blood cells.
●● What is an atom?
Answer: An atom is the smallest unit of matter that retains the properties
of an element.
●● What are the three main types of subatomic particles?
Answer: The three main types of subatomic particles are protons,
neutrons, and electrons.
●● What charge do protons and electrons carry?
Answer: Protons carry a positive charge, while electrons carry a negative
charge.
●● What is the atomic nucleus?
Answer: The atomic nucleus is the dense core at the center of an atom,
composed of protons and neutrons.
●● What is the relationship between electrons and the atomic nucleus?
Answer: Electrons form a cloud of negative charge around the nucleus,
held in place by the attraction between opposite charges.
, ●● What is the difference between an element and a compound?
Answer: An element cannot be broken down into simpler substances,
while a compound consists of two or more elements combined.
●● What is the common substance that exists in all three physical states
of matter?
Answer: Water is the only common substance that exists in solid (ice),
liquid, and gas (water vapor) states.
●● What is the significance of phytoplankton in the Arctic?
Answer: Phytoplankton thrive in warmer Arctic waters, but organisms
dependent on Arctic ice are suffering due to climate change.
●● What is sodium chloride?
Answer: Sodium chloride (NaCl) is a compound formed from sodium
(Na) and chlorine (Cl) in a 1:1 ratio.
●● What are essential elements?
Answer: Essential elements are those that an organism needs to live a
healthy life and reproduce, typically about 20-25% of the 92 natural
elements.
●● What happens to the thyroid gland with an iodine deficiency?
INSIGHT CERTIFICATION EVALUATION
EXAMS SET FULL QUESTIONS AND
COMPLETE SOLUTION
●● What determines an element's properties?
Answer: An element's properties depend on the structure of its atoms.
●● What is a compound?
Answer: A compound is a substance consisting of two or more different
elements combined in a fixed ratio.
●● What is the significance of hydrogen bonding in water?
Answer: Hydrogen bonding gives water properties that help make life
possible on Earth.
●● What percentage of the human body is made up of oxygen?
Answer: Oxygen makes up approximately 65.0% of the human body
mass.
●● What are trace elements?
Answer: Trace elements are required by an organism in only minute
quantities, typically less than 0.01% of mass.
,●● What is the role of iron in the human body?
Answer: Iron is a trace element required for the proper functioning of
hemoglobin, the molecule that carries oxygen in red blood cells.
●● What is an atom?
Answer: An atom is the smallest unit of matter that retains the properties
of an element.
●● What are the three main types of subatomic particles?
Answer: The three main types of subatomic particles are protons,
neutrons, and electrons.
●● What charge do protons and electrons carry?
Answer: Protons carry a positive charge, while electrons carry a negative
charge.
●● What is the atomic nucleus?
Answer: The atomic nucleus is the dense core at the center of an atom,
composed of protons and neutrons.
●● What is the relationship between electrons and the atomic nucleus?
Answer: Electrons form a cloud of negative charge around the nucleus,
held in place by the attraction between opposite charges.
, ●● What is the difference between an element and a compound?
Answer: An element cannot be broken down into simpler substances,
while a compound consists of two or more elements combined.
●● What is the common substance that exists in all three physical states
of matter?
Answer: Water is the only common substance that exists in solid (ice),
liquid, and gas (water vapor) states.
●● What is the significance of phytoplankton in the Arctic?
Answer: Phytoplankton thrive in warmer Arctic waters, but organisms
dependent on Arctic ice are suffering due to climate change.
●● What is sodium chloride?
Answer: Sodium chloride (NaCl) is a compound formed from sodium
(Na) and chlorine (Cl) in a 1:1 ratio.
●● What are essential elements?
Answer: Essential elements are those that an organism needs to live a
healthy life and reproduce, typically about 20-25% of the 92 natural
elements.
●● What happens to the thyroid gland with an iodine deficiency?
