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Identify the difference between elements, compounds and mixtures in terms of particle theory
Elements exist as an atom or an aggregate of atoms which cannot be decomposed
Compounds consist of two or more types of atoms chemically bonded in a fixed ratio
Mixtures consist of variable particles physically combined
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Identify that the biosphere, lithosphere, hydrosphere and atmosphere contain examples of mixtures of elements and compounds
Biosphere
Consists of the atmosphere, hydrosphere and lithosphere
Elements oxygen, silicon, aluminium, iron, calcium, carbon, hydrogen, nitrogen
Mixtures cell content and tissue, carbohydrates, proteins, lipids, vitamins
Lithosphere
Consists of the crust, including solid top of mantle
Elements oxygen, silicon, aluminium, iron, calcium
Mixtures rocks, sand, soils, mineral ores, coal/oil/natural gas
Hydrosphere
Consists of salt water, fresh water and ground water
Elements oxygen, hydrogen, chlorine, sodium, magnesium
Mixtures sea water, fresh water, ground water
Atmosphere
Layer of gay 00 00 km thick surrounding the planet
Elements nitrogen, oxygen, argon, hydrogen, carbon
Mixtures air
Identify and describe procedures that can be used to separate naturally occurring mixtures of
• solids of different sizes
• solids and liquids
• dissolved solids in liquids
• liquids
• gases
solids of different sizes
• sieving
solids and liquids
• filtration
• decantation
• sedimentation
dissolved solids in liquids
• evaporation
liquids
• distillation
• fractional distillation
• separating funnel (immiscible)
gases
• fractional distillation
Assess separation techniques for their suitability in separating examples of earth materials, identifying the differences in properties which enable these separations
Solubility
Boiling points
Density
Particle size
Describe situations in which gravimetric analysis supplies useful data for chemists and other scientists
• to decide whether a newly discovered mineral deposit contains a sufficiently high percentage of the required compound to make its extraction from that deposit economically viable
• to determine the composition of soil in a particular location to see if it is suitable for growing a certain crop
• to determine the amounts of particular substances present in water or air to decide how polluted the samples are
• to decide whether a particular commercial mixture being sold has the same percentage composition as a similar mixture being marketed by a rival company
8.. Although most elements are found in combinations on Earth, some elements are found uncombined
Explain the relationship between the reactivity of an element and the likelihood of its existing as an uncombined element
Elements with a higher reactivity are more likely to react with other elements to form compounds
Classify elements as metals, non-metals according to their physical properties
Metals are generally
• Solids at room temperature
• Shiny and lustrous
• Good electrical and thermal conductors
• Malleable and ductile
Non metals generally lack most these properties, whereas semi-metals do not fall clearly in either category.
Account for the uses of metals and non-metals in terms of their physical properties
Metals
Building material (Strong)
Electrical wiring (Electrical conductivity)
Non-metals
Electrolyte (Graphite, delocalised electrons)
Lubricant (Graphite, sliding layers)
Compound synthesis
8.. Elements in Earth materials are present mostly as compounds because of interactions at the atomic level
Identify that matter is made of particles that are continuously moving and interacting
Solids
Nature orderly arrangement of particles
Motion vibrational movement
Liquid
Nature less orderly arrangement of particles
Motion translational and vibrational movement
Please note that this sample paper on adfad is for your review only. In order to eliminate any of the plagiarism issues, it is highly recommended that you do not use it for you own writing purposes. In case you experience difficulties with writing a well structured and accurately composed paper on adfad, we are here to assist you. Your paper on adfad will be written from scratch, so you do not have to worry about its originality. Order your authentic assignment and you will be amazed at how easy it is to complete a quality custom paper within the shortest time possible!
Identify the difference between elements, compounds and mixtures in terms of particle theory
Elements exist as an atom or an aggregate of atoms which cannot be decomposed
Compounds consist of two or more types of atoms chemically bonded in a fixed ratio
Mixtures consist of variable particles physically combined
Essay service for your adfad paper
Identify that the biosphere, lithosphere, hydrosphere and atmosphere contain examples of mixtures of elements and compounds
Biosphere
Consists of the atmosphere, hydrosphere and lithosphere
Elements oxygen, silicon, aluminium, iron, calcium, carbon, hydrogen, nitrogen
Mixtures cell content and tissue, carbohydrates, proteins, lipids, vitamins
Lithosphere
Consists of the crust, including solid top of mantle
Elements oxygen, silicon, aluminium, iron, calcium
Mixtures rocks, sand, soils, mineral ores, coal/oil/natural gas
Hydrosphere
Consists of salt water, fresh water and ground water
Elements oxygen, hydrogen, chlorine, sodium, magnesium
Mixtures sea water, fresh water, ground water
Atmosphere
Layer of gay 00 00 km thick surrounding the planet
Elements nitrogen, oxygen, argon, hydrogen, carbon
Mixtures air
Identify and describe procedures that can be used to separate naturally occurring mixtures of
• solids of different sizes
• solids and liquids
• dissolved solids in liquids
• liquids
• gases
solids of different sizes
• sieving
solids and liquids
• filtration
• decantation
• sedimentation
dissolved solids in liquids
• evaporation
liquids
• distillation
• fractional distillation
• separating funnel (immiscible)
gases
• fractional distillation
Assess separation techniques for their suitability in separating examples of earth materials, identifying the differences in properties which enable these separations
Solubility
Boiling points
Density
Particle size
Describe situations in which gravimetric analysis supplies useful data for chemists and other scientists
• to decide whether a newly discovered mineral deposit contains a sufficiently high percentage of the required compound to make its extraction from that deposit economically viable
• to determine the composition of soil in a particular location to see if it is suitable for growing a certain crop
• to determine the amounts of particular substances present in water or air to decide how polluted the samples are
• to decide whether a particular commercial mixture being sold has the same percentage composition as a similar mixture being marketed by a rival company
8.. Although most elements are found in combinations on Earth, some elements are found uncombined
Explain the relationship between the reactivity of an element and the likelihood of its existing as an uncombined element
Elements with a higher reactivity are more likely to react with other elements to form compounds
Classify elements as metals, non-metals according to their physical properties
Metals are generally
• Solids at room temperature
• Shiny and lustrous
• Good electrical and thermal conductors
• Malleable and ductile
Non metals generally lack most these properties, whereas semi-metals do not fall clearly in either category.
Account for the uses of metals and non-metals in terms of their physical properties
Metals
Building material (Strong)
Electrical wiring (Electrical conductivity)
Non-metals
Electrolyte (Graphite, delocalised electrons)
Lubricant (Graphite, sliding layers)
Compound synthesis
8.. Elements in Earth materials are present mostly as compounds because of interactions at the atomic level
Identify that matter is made of particles that are continuously moving and interacting
Solids
Nature orderly arrangement of particles
Motion vibrational movement
Liquid
Nature less orderly arrangement of particles
Motion translational and vibrational movement
Please note that this sample paper on adfad is for your review only. In order to eliminate any of the plagiarism issues, it is highly recommended that you do not use it for you own writing purposes. In case you experience difficulties with writing a well structured and accurately composed paper on adfad, we are here to assist you. Your paper on adfad will be written from scratch, so you do not have to worry about its originality. Order your authentic assignment and you will be amazed at how easy it is to complete a quality custom paper within the shortest time possible!