- Study guides, Class notes & Summaries

Physical change - correct answer A change in the size or form of a substance. No new substance is formed. Chemical change - correct answer A new substance is formed. How to tell chemical change? - correct answer Precipitate, change in color, gas formed, heat and light, and difficulty to reverse change. Isotopes - correct answer Atoms of the same element having the same number of protons and electrons but a different number of neutrons Ion - correct answer A charged Atom Cations - ...

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5 pages

Written in 2023/2024

Grade A+

RealGrades

Atom - correct answer the basic (and smallest) unit of a chemical element. Made up of three parts, proton, electron, neutron. Atomic radius - correct answer the average sitance from the centre of an atom's nucleus to its electrons in the farthest orbital. Boiling Point - correct answer the temperature at which a liquid boils and turns to vapor (100°C). The boiling point for fresh water is 100°C. Binary Compound - correct answer 2 ionic compounds. Chemical Change - correct answer u...

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10 pages

Written in 2023/2024

Grade A+

RealGrades

Chemistry Midterm Exam Study Guide, Practice Questions & Exam Review 2026/2027

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9 pages

Written in 2026/2027

Grade A+

DoctorHkane

atom - correct answer the smallest particle of an element that retains its identity in a chemical reaction atomic mass - correct answer the weighted average of the masses of the isotopes of an element atomic number - correct answer the number of protons in the nucleus of an atom of an element group/column - correct answer a vertical column of elements in the periodic table; the constituent elements of a group have similar chemical and physical properties period/row - correct answer h...

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7 pages

Written in 2023/2024

Grade A+

RealGrades

Organic Chemistry - correct answer The study of carbon, its structures and reactivity. Alcohol - correct answer Phenyl group - correct answer Ketone - correct answer Carboxylic Acid - correct answer Ester - correct answer Ether - correct answer Aldehyde - correct answer Amide - correct answer Amine - correct answer Alkyl halide - correct answer Chemical Formula for Alkane - correct answer Cn H2n+2 Chemical Formula for Alkene - correct answer Cn H2n ...

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6 pages

Written in 2023/2024

Grade A+

RealGrades

Atomic number - correct answer Number of protons in an element Mass number - correct answer Number of protons and neutrons Ion - correct answer Electrically charged particle formed by the loss/gain of electrons Relative masses of P,N and E - correct answer 1,1, 1/2000 (respectively) Isotopes - correct answer Atoms of the same element with different number of neutrons but same number of protons. What are steps of mass spectroscopy? - correct answer Ionisation, Acceleration, Deflect...

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26 pages

Written in 2023/2024

Grade A+

RealGrades

Atom correct answer Smallest particle of an element that retains the properties of the element The number of protons equal _____correct answer The number of electrons Electron correct answer A negatively charged, fast-moving particle with an extremely small mass that is found in all forms of matter and moves through the empty space surrounding an atoms nucleus Proton correct answer A subatomic particle carrying a charge equal to but opposite that of an electron Neutron correct answer...

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4 pages

Written in 2023/2024

Grade A+

RealGrades

Catalyst (enzyme) -correct answer A substance that increases the rate of a chemical reaction without being changed itself, lowers the activation energy needed for a reaction Electrolyte -correct answer A substance that is dissolved in solution and some of its molecules split or dissociate into electrically charged atoms or ions Oxidant -correct answer Causes a GAIN of electrons and is REDUCED in a chemical reaction Reductant -correct answer Causes a LOSS of electrons and is OXIDIZED in ...

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19 pages

Written in 2023/2024

Grade A+

RealGrades

calcium iodide - correct answer CaI2 magnesium nitrate - correct answer Mg(NO3)2 iron(II) acetate - correct answer Fe(C2H3O2)2 lead(IV) oxide - correct answer PbO2 calcium hydride - correct answer CaH2 copper(II) sulfide - correct answer CuS hydrogen sulfide (g) - correct answer H2S magnesium nitrate - correct answer MgNO3 iron(II) acetate - correct answer Fe(C2H3O2)2 calcium iodide - correct answer CaI2 calcium hydride - correct answer CaH2 potassium chromate - ...

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6 pages

Written in 2023/2024

Grade A+

RealGrades

Chemistry - correct answer Study of matter -composition -structure -energy changes it goes through Matter - correct answer -is all around us -can be identified by its physical or chemical properties -any substance regs takes up space (volume) and has mass Atom - correct answer Most simple form of matter Element - correct answer -homogenous -cannot be broken down simpler by physical or chemical means -atomic numbers -periodic tables -represented by one or two letters Compound...

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8 pages

Written in 2023/2024

Grade A+

RealGrades

Mole concept - correct answer mole is the chemist's counting unit. One mole of any substance- element or compound- consists of 6.02 X 10²³ formula units of the substance. Conversion of moles - correct answer number of moles = mass x molar mass N=m (g) M (g/mol-1) Molecular formula - correct answer Molecular formula is the number of each type of atom in the smallest viable unit of the substance. Atomic Mass - correct answer This is the mass of the atom of a specific element. It is ...

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4 pages

Written in 2023/2024

Grade A+

RealGrades

What was the first subatomic particle discovered? - correct answer The electron Ionic bonding is between a.. - correct answer metal and non metal The transfer of electrons from one atom to another is called - correct answer ionic bonding Which atoms are diatomic - correct answer BrINClHOF A gas is most ideal at what - correct answer low pressure and high temperature Partial charges are used in which type of bonding - correct answer ionic Which three things does hydrogen bond to...

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4 pages

Written in 2023/2024

Grade A+

RealGrades

Peta - correct answer P 10¹⁵ Tera - correct answer T 10¹² Giga - correct answer G 10⁹ Mega - correct answer M 10⁶ Kilo - correct answer k 10³ Deci - correct answer d 10⁻¹ Centi - correct answer c 10⁻² Milli - correct answer m 10⁻³ Micro - correct answer u 10⁻⁶ Nano - correct answer n 10⁻⁹ Pico - correct answer p 10⁻¹² Femto - correct answer f 10⁻¹⁵ Atto - correct answer a 10⁻¹⁸ Zepto - correct answer z 10⁻²¹ 1...

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3 pages

Written in 2023/2024

Grade A+

RealGrades

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 answe...

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17 pages

Written in 2023/2024

Grade A+

RealGrades

STP - correct answer 0°C and 1 atm Ideal Gas Law - correct answer PV = nRT At STP, 1 mol of gas will occupy ... - correct answer 22.4 L Characteristics of an Ideal Gas - correct answer 1. Gas molecules have zero volume 2. Gas molecules exert no forces other than repulsive forces due to collisions 3. Gas molecules make completely elastic collisions 4. The avg. kinetic energy of gas molecules is directly proportional to the temperature of the gas Partial pressure of a gas (equation...

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28 pages

Written in 2023/2024

Grade A+

RealGrades

hazard - correct answer something that can cause harm hazard symbol - correct answer standard symbol that warns of a particular type of hazard compound - correct answer two or more different elements that are chemically joined together element - correct answer A pure substance made of only one kind of atom chemical symbol - correct answer shorthand way of representing elements molecule - correct answer two or more atoms chemically joined together mixture - correct answer two or...

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2 pages

Written in 2023/2024

Grade A+

RealGrades

Element - correct answer A pure substance that cannot be broken down into a simpler substance Atom - correct answer The most basic unit of matter. It is the smallest part of an element that still has the properties of an element Protons - correct answer Positive (1+) and are found inside the nucleus Neutrons - correct answer Neutral and are found inside the nucleus Electrons - correct answer Negative (1-) and are found outside the nucleus In a single atom - correct answer The numb...

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3 pages

Written in 2023/2024

Grade A+

RealGrades

binary compound - correct answer chemical compound composed of only two elements bionary ionic compound - correct answer contain a positive ion (cation) and a negative ion (anion) which happens when a metal loses one or more electrons and the nonmetal gains one or more electrons polyatomic ion - correct answer A tightly bound group of atoms that behaves as a unit and has a positive or negative charge. oxyanion - correct answer a polyatomic ion that contains oxygen acid - correct answ...

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3 pages

Written in 2023/2024

Grade A+

RealGrades

law of conservation mass - correct answer mass is neither destroyed or created during ordinary chemical or physical reactions law of definite proportions - correct answer a chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compund law of multiple proportions - correct answer if two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element comb...

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4 pages

Written in 2023/2024

Grade A+

RealGrades

State the method used to obtain sand from a mixture of sand and water - correct answer filtration State the method used to obtain solid copper sulfate from aqueous copper sulfate - correct answer crystallisation State the method used to obtain red food dye from a mixture of food dyes - correct answer paper chromatography State the method used to obtain water from salt water - correct answer simple distillation Draw a diagram to show equipment used in simple distillation - correct ans...

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3 pages

Written in 2023/2024

Grade A+

RealGrades

Matter - correct answer Anything that has mass and takes up space Atom - correct answer The smallest unit of matter; composed of protons, neutrons and electrons Nucleus - correct answer The center of an atom; composed of protons and neutrons Proton - correct answer Positively charged subatomic particle Electron - correct answer Negatively charged subatomic particle Neutron - correct answer Subatomic particle with no charge Element - correct answer A pure substance made from onl...

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23 pages

Written in 2023/2024

Grade A+

RealGrades

Mass in SI Units - correct answer Kg Time in SI Units - correct answer Seconds Temperature in SI Units - correct answer Kelvin -273 Celsius Volume in SI Units - correct answer Meters Cubed Purify a solid from a solid-liquid mixture - correct answer Filtration Purify a dissolved salt from a solution - correct answer Crystalization Purify an Iodine or a Carbon Dioxide from a mixture - correct answer Boil off and Sublimate Separate 2 miscible liquids - correct answer Distillati...

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23 pages

Written in 2023/2024

Grade A+

RealGrades