Upgrade to remove ads
Yr9 Chemical Reactions
Terms in this set (80)
A substance that dissolves in water to produce hydrogen ions.
A soluble base is called an alkali.
Emission of alpha particles (helium nuclei) in a nuclear reaction.
The smallest particle of an element that can take part in a chemical reaction.
The total mass of the protons and neutrons in an atom.
A representation to show the arrangement of particles in an atom.
The number of protons in an atom.
Radiation coming from sources other than that being observed (e.g., cosmic radiation and radiation from unstable isotopes in rocks and soil).
A substance that dissolves in water to produce hydroxide ions.
The becquerel (Bq) is the unit used to measure the decay rate of radioisotopes. It is the number of atoms that decay per second.
Emission of beta particles (electrons) in a nuclear reaction.
A large molecule containing only carbon, hydrogen and oxygen (e.g., glucose, starch).
Cathode ray tube
A vacuum tube containing an electron emitter and a fluorescent screen to view images produced by the electron beam.
A summary of the reactants and products in a chemical reaction.
A change that results in new substances being formed.
To sort objects into groups based on their properties.
A chemical reaction in which a fuel reacts with oxygen to release energy.
A substance made up of two or more atoms joined by chemical bonds.
A force between non-metal atoms due to the sharing of electrons to form molecules.
A compound that is formed by the sharing of electrons between non-metallic elements.
A chemical reaction in which a compound is broken down into simpler substances.
A sub-atomic particle with a negative charge. Electrons travel in orbitals around the nucleus of an atom.
The number and arrangement of electrons in shells (energy levels) in an atom.
A substance made up of only one kind of atom.
A chemical reaction which requires energy.
The energy level of electron orbitals is related to distance from the nucleus; the further away from the nucleus, the higher the energy level of the electrons.
A chemical reaction in which energy is released in the form of heat.
A reaction in which energy is produced in the absence of oxygen.
Electromagnetic radiation of high energy that can be emitted from radioactive substances.
An instrument used to measure radioactivity by counting ionisation of particles.
A vertical section of the Periodic Table containing elements with similar outer electron configurations.
An industrial process for the production of ammonia from the elements nitrogen and hydrogen.
The time taken for half of the radioactive atoms in a sample to decay.
A statement that predicts a possible explanation for observations, that can be tested by experiment.
Incomplete combustion occurs if there is insufficient oxygen, so that less energy is produced. The products of the reaction include carbon monoxide and carbon (soot).
A particle that is charged due to the addition or removal of electrons from a neutral atom.
A force between metallic and non-metallic particles due to attraction between positive and negatively charged ions.
A compound formed from metal and non-metal ions.
A solution in which the ions are free to move and conduct electricity.
An atom of the same element with a different number of neutrons.
A theory to which no exceptions have been found at the time it is made. Scientific laws explain why things happen.
An acid/base indicator obtained from lichens.
Anything that takes up space and has mass.
An element that displays some properties of both metals and non-metals.
A model representing the arrangement of atoms and shape of a molecule.
Two or more atoms chemically combined together in fixed proportions.
Neither acidic nor basic. A substance with equal amounts of hydroxide and hydrogen ions and a pH of 7.
A reaction between an acid and base that produces salt and water.
A neutral particle, of equivalent mass to a proton, found in the nucleus of atoms.
The process where an unstable nucleus splits into two smaller nuclei accompanied by a large release of energy.
A nuclear reaction in which two or more atomic nuclei collide at very high speed and join to form a different element, releasing a huge amount of energy.
Nuclear power station
A power station in which nuclear energy (fission) is used to produce electricity.
The small, dense centre of an atom containing protons and neutrons.
The act of noting, recording and possibly measuring something, often by using an instrument.
An individual piece of matter. Particles include atoms and molecules as well as a variety of even smaller sub atomic entities.
The ability of radiation to pass through barriers (e.g., paper, aluminium, lead).
A horizontal section (row) of the Periodic Table containing elements with the same number of electron shells.
A scale indicating the hydrogen ion concentration in a solution. It ranges from 0 (strong acid) to 14 (strong base). A pH of 7 is neutral.
A person who offers views or theories on profound questions in ethics, abstract concepts, logic and other related fields.
A polar molecule has positive and negatively charged ends.
A charged particle made up of two or more elements that are covalently bonded together and act as one unit (e.g., hydroxide (OH-)).
A solid produced in a chemical reaction.
The substances produced in a chemical reaction.
A feature of a substance that can be used to classify or identify it.
Positively charged particle found in the nucleus of an atom. Each element has a different specific number of protons in its nucleus.
The process in which energy is transmitted as particles or waves (e.g., gamma rays, beta particles).
The spontaneous disintegration of an unstable nucleus leading to the emission of radiation.
Radiocarbon dating (or carbon dating) is a dating technique that uses the decay of carbon-14 to measure the age of materials originating from living things (e.g., wood, leather, bones) up to about 60,000 years old.
An atom with an unstable nucleus that decays to form a more stable nucleus of a different element.
The distance over which something (e.g., radiation) can be detected or sampled.
The substances present before a chemical change takes place.
A substance (reactant) added to make a chemical reaction occur.
The reliability of an experiment is a measure of its consistency; if repeated the same results are obtained.
The chemical reactions in which cells obtain energy. Glucose combines with oxygen in a complex series of reactions to produce energy, carbon dioxide and water.
A substance produced in a neutralisation reaction between an acid and a base.
A sievert (Sv) is the unit used to measure the radiation dose absorbed by the body.
Ions that remain in solution after a precipitate has formed.
An hypothesis that has been supported by repeated scientific testing.
The combining power of an atom determined by the number of outer shell electrons.
The validity of an experiment is determined by how well the design enables the aims to be achieved. A controlled experiment is valid if all variables that may affect the experiment are controlled and only one factor (the independent variable) is changed.
THIS SET IS OFTEN IN FOLDERS WITH...
Yr9 Light Action Sound
Yr9 Earth's Great Balancing Act
Yr9 How to maintain healthy body and ecosystems
YOU MIGHT ALSO LIKE...
MCAT | Mometrix Comprehensive Guide
Science 10 Unit 1
Semester 1 Exam Vocab
Unit 5 Voc ps
OTHER SETS BY THIS CREATOR
Water - everything about separation
Water Purification Week 2/3
Year 7 Deliverable 3