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John Dalton was the founder of the atomic theory. The main points of his atomic theory were:Elements are made up of tiny particles called atoms. Atoms cannot be divided, altered or destroyed by chemical means. Atoms of an element are all the same in terms of shape and size and atoms of...
A black light is also called an ultraviolet light; it emits some parts of the electromagnetic spectrum that are not visible to the unaided human eye. Why Quinine Glows Quinine contains rare earth compounds called phosphors. These substances glow when they are hit with particular wavelengths of the...
Atom Smallest particle of an element that has all the properties of that element Atomic theory is the study of the nature of atoms and how atoms combine to form all types of matter. Atomic Theory Subatomic particles come together to form atoms Particles: 1. Protons – positive particles in ...
Weathering is a phenomenon that occurs slowly over time, which causes deterioration in both aspect and properties of materials, due to irreversible changes in their chemical properties1. The main factors of weathering process are light/UV radiation, temperature and oxygen, causing specific chemical deg...
What is an atom that has a different number of neutrons than other atoms of the same element? How many subatomic particles are in an atom? The amount of which subatomic particle is different between an atom and its ion? Which two particles in an atom are equal in numbe...
2 All atoms of an element are alike in mass and other properties, but the atoms of one element are different from those of all other elements. 3 In each of their compounds, different elements combine in a simple numerical ratio: e.g. one atom of A to one of B (AB) or one atom ...
What are the three particles of an atom? What are the three main particles in an atom? Which two subatomic particles have the same mass? Which two particles in an atom are equal in number? What are the two parts of an atom? What atomic particle in an atom is the same for each eleme...
Match each of the following topic sentences with a supporting detail from below: A. This has been put down to the current economic climate, which shows no sign of improving. B. The main reason for this is that they make sure their recommended candidates are suitable. C. Employers understand...