General Chemistry Knowledge Questions & Answers

General Chemistry Knowledge Questions & Answers actinide series - CORRECT ANSWER - (chemistry) a series from actinium to lawrencium of 15 radioactive elements with increasing atomic numbers alkali metals - CORRECT ANSWER - Group 1, 1 electron in outer level, very reactive, soft, silver, shiny, low density; Lithium, Sodium, Potassium, Rubidium, Cesium, Francium allotrope - CORRECT ANSWER - a structurally different form of an element; graphite and a diamond are allotropes, having the same formula but different structure to the atoms alloy - CORRECT ANSWER - a solution of two or more metals alpha particle - CORRECT ANSWER - A particle, much like a He atom, that is sometimes emitted during radioactive decay. Usually happens in molecules that are very large. anion - CORRECT ANSWER - an ion with a negative charge Aufbau principle - CORRECT ANSWER - electrons enter orbitals of lowest energy first beta particle - CORRECT ANSWER - A particle, much like an electron, that is sometimes emitted during radioactive decay. Emission causes a neutron to change to a proton. Bohr - CORRECT ANSWER - a Danish physicist (); created a new atomic model; described electrons as moving around the nucleus in fixed orbits and having a set amount of energy bond energy - CORRECT ANSWER - the energy required to break a chemical bond and form neutral isolated atoms bond length - CORRECT ANSWER - the distance between two bonded atoms at their minimum potential energy, that is, the average distance between two bonded atoms cathode ray experiment - CORRECT ANSWER - An experiment that showed that electrons had mass and a charge cation - CORRECT ANSWER - an ion with a posotive charge chain reaction - CORRECT ANSWER - a reaction in which the material that starts the reaction is also one of the products and can start another reaction chemical bond - CORRECT ANSWER - a mutual electrical attraction between the nuclei and valence electrons of different atoms that binds the atoms together chemical energy - CORRECT ANSWER - energy stored in chemical bonds chemical formula - CORRECT ANSWER - a combination of chemical symbols and numbers to represent a substance