IB Chemistry Study guides, Class notes & Summaries

Alkanes - Ans Functional Group: none Suffix: -ane Formula: C(n)H(2n+2) Alkenes - Ans Functional Group: alkenyl Suffix: -ene Formula: C(n)H(2n) Alkynes - Ans Functional Group: alkynyl Suffix: -yne Formula: C(n)H(2n-2)

biomolecule - Ans a molecule that functions in maintaining and/or reproducing life hydrocarbon - Ans a compound consisting only of hydrogen and carbon saturated - Ans describes a hydrocarbon in which all carbon-carbon bonds are single bonds unsaturated - Ans describes a hydrocarbon containing carbon-carbon multiple bonds alkane - Ans another name for saturated hydrocarbons, alkanes have the general formula of C(n)H(2n+2)

relative atomic mass (Ar) - Ans weighted mean of all the naturally occurring isotopes of the element (g/mol) relative molar mass (Mr) - Ans sum of Ar (no units) mole - Ans 6.02x10^-23 Empirical Formula - Ans shows the simplest whole number ratio of atoms of each element in a particular substance Molecular Formula - Ans shows the actual number of atoms of each element in a particular molecule or substance

Stoichiometry - Ans The calculation of quantities in chemical reactions Atom - Ans the basic unit of a chemical element. Molecule - Ans A group of the same atoms bonded together Compound - Ans A substance made up of atoms of two or more different elements joined by chemical bonds Law of Conservation of Mass - Ans Matter is not created nor destroyed in any chemical or physical change

exothermic reaction - Ans a chemical reaction in which heat is released to the surroundings heat - Ans Measure of total energy in a substance will depend on the amount. Always transfers or flows from a region of higher temperature to a region of lower temperature temperature - Ans the measurement of kinetic energy standard enthalpy of combustion - Ans the enthalpy change when one moles of substance is burned in excess oxygen under standard conditions

first ionization energy - Ans the energy required to remove the first electron from an atom Why do first ionisation energies increase across a period? - Ans The number of protons increase with the same number of shielding shells Why do melting points decrease down a group? - Ans The ionic/atomic radius increase and there is a smaller charge density. State an equation for the reaction of phosphorus (V) oxide, P4O10 (s), with water. - Ans P4O10 (s) + 6H2O (l) → 4H3PO4 (aq

element - correct answera substance that cannot be broken down into simpler substances. atom - correct answersmallest part of an element. compound - correct answersubstance that contains more than one element. empirical formula - correct answerthis shows the simplest whole number ratio of atoms of each element in a particle of the substance. molecular formula - correct answershows the actual number of atoms of each element in a molecule of the substance. structural formula - corre...

IB Chemistry Unit 2 SL Latest Version Graded A+ Emission spectrum ️️An emission spectrum is produced when an atom moves from a higher to a lower level. The line emission spectrum of hydrogen provides evidence for __________________ which converge at _____________ ️️The line emission spectrum of hydrogen provides evidence for the existence of electrons in discrete energy levels which converge at higher energies. Continuous spectrum ️️All the colours / wavelengths present ...