Acids and Bases 2.0 / 5 based on 2 ratings ? ScienceNational 5All boards Created by: alanaCreated on: 10-11-12 02:52 What is an electron A negatively charged component of an atom, surrounding the atoms nucleus 1 of 22 What is a proton Component of the nucleus with a relative mass number of 1 and charge of +1 2 of 22 What is a neutron A component of the nucleus with a relative mass number of 1 and no charge 3 of 22 What is a nucleus The centre of an atom composed of protons and neutrons, possessing 99.9% of the mass 4 of 22 What is the atomic number The number of protons in the nucleus of an atom. Places it on the periodic table 5 of 22 What is the atomic mass The total number of protons and neutrons in the nucleus 6 of 22 What is a compound A substance composed of two or more elements 7 of 22 Element A class of substances that cannot be seperated into simpler substances by chemical means 8 of 22 Ion An electrically charged atom, or goup of atoms formed by the loss or gain of one or more electrons 9 of 22 What is a cation A positively charged atom or group of atoms caused by an atom or group of atoms losing one or more electrons 10 of 22 What is an Anion A negatively charged atom or group of atoms caused by losing one or more electrons 11 of 22 What is an Isotope atoms of the same element that have the same atomic number but different atomic mass (no. of neutrons) 12 of 22 What is a particle one of the extremely small constituents of matter. e.g. atoms molecules ions common particles 13 of 22 What is Particle Theory The theory that matter is made up of tiny particles which are constantly moving 14 of 22 What is collision theory The theory that in order for a chemical reaction to occur two or more particles must collide with sufficient energy and at the correct orientation 15 of 22 What is concentration is the measure of how much there is of a given substance 16 of 22 What is surface area Total area of exposed surfaces 17 of 22 What is Kinetic Energy energy that an object possesses by being in motion 18 of 22 Reaction Rate a measure of how fast reactants become products 19 of 22 What is a catalyst? a substance that speeds up a chemical reaction but is not used up in that reaction 20 of 22 What is activation energy? least amount of energy required to start a chemical reaction 21 of 22 What is an atom? is the defining structure of an element. cannot be broken by any chemical means 22 of 22
Comments
No comments have yet been made