A-level Chemistry

Chemistry 2025 atom - anssmallest part of an element that can be identified as that element atomic mass - anstotal mass of the protons and neutrons in an atom atomic number - ansnumber of protons in the nucleus of an atom. This is the same number as the number of electrons chemical bond - ansforce of attraction that holds atoms together chemical change: - anschange that produces new substances - burning wood to make ashes or mixing mentos and coke. You can't get the wood or the m...

Chemistry IGCSE Revision 2025 Acid Rain - ansCaused when water and oxygen in the atmosphere react with sulphur dioxide to produce sulphuric acid or with various oxides of nitrogen to give nitric acid. SO2 and NO2 come mainly from power stations and factories burning fossil fuels or from motor vehicles. Effects: kills trees, causes life in ponds and rivers to die, affects limestones e.g. statues. Solution: Catalytic converters in cars to convert oxides of nitrogen into nitrogen gas but have no e...

Chemistry: Final Exam Review Ammonia, acid or base? - ansBase (drain cleaners are bases). Are noble gases reactive? - ansNO! They have a full octet of electrons. They do not want to react with anything. Balance the equation: C3H8 + O2 ---> CO2 + H2O - ans1 C3H8 + 3 O2 ---> 5 CO2 + 4 H2O Balance the equation: H2 + O2 -----> H20 - ans2 H2 + O2 ----> 2 H20 C2H4 + 3 O2 ----> 2 CO2 + 2 H2O

Chemistry 2024/2025 alkali metals - ansthe highly reactive metallic elements located in group 1 of the periodic table Alkaline Earth Metals - ansAn elements in Group 2 of the periodic table that are harder than Alkali Metals and less reactive atom - ansThe smallest particle of an element atomic mass - ansprotons + neutrons in the nucleus of an atom atomic number - ansthe number of protons in the nucleus of an atom boiling point - ansthe temperature at which a substance turns from...

chapter 6 chemistry a lewis structure - ansbonding within many molecules and ions are indicated by ... atoms of nonmetals - ansmetals bonds ionically with.. bond energy - ansthe energy required to break a chemical bond and form neutral isolated atoms bond length - ansthe distance between two bonded atoms at their minimum potential energy, that is, the average distance between two bonded atoms by calculating the difference in the elements' electronegativities - ansThe degree in wh...

Basic Chemistry 2025 atom - ansthe smallest particle of an element that retains the properties of the element atomic number - ansidentifies a specific element; equals the number of protons in an atom of each element chemical formula - ansindicates the number and types of atoms in a molecule chemical reaction - ansindicates the formation of new substances from previous substances chemical reaction - ansinteraction of substances that lead to the formation of new substances compound...

AS Level Chemistry 2025 1 mole - ANSThe amount of substance that contains as many elementary particles as there are in 12 of carbon 12. 1st Ionisation energy - ANSThe energy change when 1 mole of electrons is removed from 1 mole of gaseous atoms to form 1 mole of gaseous 1+ions Acceleration - ANSThey are accelerated through magnetic/electric field Acid - ANSProton donor Acid + Ammonia - ANSAcid + Ammonia Ammonium Salt Acid + Base neutralisation - ANSAcid + Base Salt + Water Ac...

Organic Chemistry 2024 "-oate" - ansNomenclature for the acid group in an ester. "-yl" - ansNomenclature for the alchohol group in an ester. Alcohols - ansOrganic compounds that contain the hydroxyl group (R-OH). Noted by the the suffix "-ol" Aldehydes - ansHydrocarbon derivatves in which two of the hydrogen atoms, attached to a terminal carbon, have been replaced by a double-bonded oxygen atom (carbonyl group). Noted by the suffix "-al" Aliphatic Hydrocarbon...

Grade 10 chemistry 2025 Acid - ansAcids are molecules that contain hydrogen atoms in combined form. It ionizes and releases hydrogen ions when dissolved in water. Anions - ansIons that has negative charges Bases - ansBases are molecules that usually contain hydroxide ion combined with a metal ion. When it dissolves in water, D disassociate and release hydroxide ions. Binary acids - ansCompounds formed when hydrogen combines with a non-metal ion. Binary compounds - ansCompound that c...

Chemistry-1 EXAM REVIEW Guarateed A+ Alkali Earth Metals - ansGroup 2, 2 electron in the outer energy level, very reactive but less reactive than alkali metals, silver, higher densities than alkali metals; Beryllium, Magnesium, Calcium, Strontium, Barium, Radium Alkali Metals - ansGroup 1, 1 electron in outer level, very reactive, soft, silver, shiny, low density; Lithium, Sodium, Potassium, Rubidium, Cesium, Francium Alloys - ansmixtures composed of two or more ...