Grade 11 Chemistry Exam with
Verified Detailed Answers
Element -
correct answer ✅A pure substance that can't be broken down into
simpler substances by chemical means; a substance composed of
entirely one kind of atom.
Compound -
correct answer ✅A pure substance that can be broken down by
chemical means to produce two or more pure substances; a
substance containing atoms of more than one element combined in
fixed proportions
Metal -
correct answer ✅Element that is a conductor of electricity,
malleable, ductile and lustrous
SATP -
correct answer ✅Standard ambient temperature (25°C) and
pressure (100kPA)
STP -
correct answer ✅Standard temperature (0°C) and pressure
101.325(kPA)
,Grade 11 Chemistry Exam with
Verified Detailed Answers
Empirical definitions -
correct answer ✅defines in terms of observable properties
Non-metal -
correct answer ✅generally a non-conductor and brittle
Metalloid -
correct answer ✅near "staircase line," some metallic and non
metallic properties
IUPAC -
correct answer ✅International Union of Pure and applied
chemistry. IUPAC's mission involves promoting the inter-national
aspects of chemistry and applying chemistry to the service of
humanity. In
so doing, IUPAC promotes the values, standards, and ethics of
science.
Law of triads -
correct answer ✅Johann Dobereiner's organization of elements in
groups of three, in which the middle element would have
properties between the other two.
,Grade 11 Chemistry Exam with
Verified Detailed Answers
Law of Octaves -
correct answer ✅The pattern that John Alexander Newland
observed as he organized elements using increasing atomic mass.
Empirical knowledge -
correct answer ✅Knowledge that comes from investigation and
observation.
Theoretical knowledge -
correct answer ✅Knowledge that explains scientific observations
Theory -
correct answer ✅An explanation or model based on observation,
experimentation and reasoning
Aristotle -
correct answer ✅Creator of the four essential elements theory in
which fire, water, air and Earth created matter.
, Grade 11 Chemistry Exam with
Verified Detailed Answers
Democritus -
correct answer ✅Argued in 400BCE that matter could be divided
into small indivisible particles known as atomos (cannot be cut)
John Dalton -
correct answer ✅Inventor of the atomic theory in 1803
elements, indivisible, atoms, element, identical, element, different,
constant, substances, rearranged, substances, created, destroyed -
correct answer ✅Atomic Theory fill in the blanks (Separate words
with a comma and space)
1. All______is composed of tiny ________particles known as ____
2. All atoms of an ______ are _________
3.Atoms of different _________s are _________
4. Atoms of two or more elements can combine in ______ ratios to
form new ___________
5. Atoms are ________ to form new _________ in chemical
reactions, but they are never ________ or ________
Electron -
correct answer ✅a negatively charged particle in an atom or ion.
Verified Detailed Answers
Element -
correct answer ✅A pure substance that can't be broken down into
simpler substances by chemical means; a substance composed of
entirely one kind of atom.
Compound -
correct answer ✅A pure substance that can be broken down by
chemical means to produce two or more pure substances; a
substance containing atoms of more than one element combined in
fixed proportions
Metal -
correct answer ✅Element that is a conductor of electricity,
malleable, ductile and lustrous
SATP -
correct answer ✅Standard ambient temperature (25°C) and
pressure (100kPA)
STP -
correct answer ✅Standard temperature (0°C) and pressure
101.325(kPA)
,Grade 11 Chemistry Exam with
Verified Detailed Answers
Empirical definitions -
correct answer ✅defines in terms of observable properties
Non-metal -
correct answer ✅generally a non-conductor and brittle
Metalloid -
correct answer ✅near "staircase line," some metallic and non
metallic properties
IUPAC -
correct answer ✅International Union of Pure and applied
chemistry. IUPAC's mission involves promoting the inter-national
aspects of chemistry and applying chemistry to the service of
humanity. In
so doing, IUPAC promotes the values, standards, and ethics of
science.
Law of triads -
correct answer ✅Johann Dobereiner's organization of elements in
groups of three, in which the middle element would have
properties between the other two.
,Grade 11 Chemistry Exam with
Verified Detailed Answers
Law of Octaves -
correct answer ✅The pattern that John Alexander Newland
observed as he organized elements using increasing atomic mass.
Empirical knowledge -
correct answer ✅Knowledge that comes from investigation and
observation.
Theoretical knowledge -
correct answer ✅Knowledge that explains scientific observations
Theory -
correct answer ✅An explanation or model based on observation,
experimentation and reasoning
Aristotle -
correct answer ✅Creator of the four essential elements theory in
which fire, water, air and Earth created matter.
, Grade 11 Chemistry Exam with
Verified Detailed Answers
Democritus -
correct answer ✅Argued in 400BCE that matter could be divided
into small indivisible particles known as atomos (cannot be cut)
John Dalton -
correct answer ✅Inventor of the atomic theory in 1803
elements, indivisible, atoms, element, identical, element, different,
constant, substances, rearranged, substances, created, destroyed -
correct answer ✅Atomic Theory fill in the blanks (Separate words
with a comma and space)
1. All______is composed of tiny ________particles known as ____
2. All atoms of an ______ are _________
3.Atoms of different _________s are _________
4. Atoms of two or more elements can combine in ______ ratios to
form new ___________
5. Atoms are ________ to form new _________ in chemical
reactions, but they are never ________ or ________
Electron -
correct answer ✅a negatively charged particle in an atom or ion.
