Science Crossword

A particle made of two protons and two neutrons, emitted as ionising radiation from some radioactive isotopes.
The smallest neutral part of an element that can take part in chemical reactions
A tiny particle with a negative charge and very little mass.
A simple substance made up of only one type of atom
The model that explains the properties of different states of matter in terms of the movement of particles.
The central part of an atom or ion.
Another term for kinetic theory.
A particle that is smaller than an atom, such as a proton, neutron or electron.
The number of protons in the nucleus of an atom. It is also known as the proton number.
Atoms of an element with the same number of protons (atomic number) but different mass numbersdue todifferent numbersof neutrons.
The total number of protons and neutrons in the nucleus of an atom. It is also known as the nucleon number.
A particle found in the nucleus of an atom having zero charge and mass of 1 (relative to a proton).
A particle found in the nucleus (neutron or proton)
Another term for mass number.
A particle found in the nucleus of an atom, having a positive charge and the same mass as a neutron.
The number of protons in an atomic nucleus. Another term for atomic numbe
The mass of something compared to the mass of something else which is often given the mass of 1.
A spectrum of light (or other electromagnetic radiation) that includes black lines. These are caused by some wavelengths being absorbed by the materials that the light (or radiation) passes through.
A form of energy transfer,including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays and gamma rays.
Area around a nucleus that can be occupied by electrons.
A set of wavelengths of light or other electromagnetic radiation showing which wavelengths have been given out (emitted) by a substance.
An atom or group of atoms with an electrical charge due to the gain or loss of electrons.
Radiation that can cause charged particles (ions) to be formed. It can cause tissue damage and DNA mutations.
A word used to describe the way electrons move around the nucleus of an atom.
An atom that has lost electrons and so has an overall positive charge.
Electromagnetic waves that can be detected by the human eye.
The part of the electromagnetic spectrum that can be detected by our eyes.
The distance between a point on one wave and the same point on the next wave.