mmcl

mmcl What always happens in a chemical reaction ? A new substance is always formed in a chemical reaction answer

mmcl What changes might indicate that a chemical reaction has taken place? Energy change Permanent colour change Gas produced (effervescence) Solid formed in a liquid answer

mmcl An element is ……… An element is the simplest type of substance. It is made up of only 1 type of atom. answer

mmcl What is a GROUP in the Periodic Table? A column answer

mmcl What are the Group 1 elements called? Alkali metals answer

mmcl What are the Group 7 elements called? Halogens answer

mmcl What are the Group 0 (8) elements called? Noble gases answer

mmcl What are compounds? Substances made of two or more different types of atom joined together. answer

mmcl What is the difference between a compound and a mixture? The atoms of a compound are joined together. The substances in a mixture are NOT joined and can be easily separated. answer

mmcl What element is present in compounds that have names ending in –ate and –ite? oxygen answer

mmcl What does -ide at the end of the name of a compound indicate? IDE means that the compound is made up of the TWO elements obvious from the name. Except: Hydroxide (something + H + 0) and Cyanide (something + C + N) answer

mmcl A solute is ………. A solute is a substance ( usually a solid ) which dissolves in a solvent to form a solution. answer

mmcl A solvent is ………… A liquid in which a solute dissolves. answer

mmcl What is a SOLUTION? A solution is formed by dissolving a solute (usually a solid) in a solvent (usually a liquid) answer

mmcl What is an AQUEOUS SOLUTION? An aqueous solution is one where the solvent used to dissolve the solute is water answer

mmcl What is meant by a property of a chemical? A property of a chemical is what it is like or what it can do chemically answer

mmcl What is the meaning of the words CONCENTRATED and DILUTE? Concentrated solutions have a large amount of solute in a relatively small volume of solvent. Dilute solutions have a relatively small amount of solute answer

mmcl What is a SATURATED solution? A saturated solution is a solution which cannot dissolve any more solute. answer

mmcl Where in the Periodic Table would you find the METALS and the NON-METALS? Metals are found to the Left Hand Side of the zigzag line; Non-metals to the Right Hand Side of the zig-zag line answer

mmcl What are ATOMS? Atoms are very small, particles which make up every element. They are too small to see. answer

mmcl What is a PRECIPITATE? A precipitate is a solid which forms in a liquid when a chemical change takes answer

mmcl What is EFFERVESCENCE? Effervescence is bubbling and fizzing when a gas is given off. answer

mmcl Give the SYMBOLS for the elements - lead, gold, sodium, potassium and iron? Lead – Pb Gold – Au Sodium – Na Potassium – K Iron - Fe answer

mmcl What is the difference between COLOURLESS and CLEAR? Colourless means having no colour. Clear means you can see through something. answer

mmcl2003 SOLUBLE means …….. 25.SOLUBLE means …….. the substance dissolves in the solvent answer