Atoms

SCIENCE EXAM STUDY NOTES Chemistry Sub submarine nuclear particleic Particles The atom is reinforced three basic types of subnuclear particles. Protons: These charter a unconditional charge and devolve on in the centre of the atom called the nucleus. Neutrons: These reserve no charge and sit in the nucleus with the protons. Electrons: These have a negative charge. They tress around the nucleus at very high speeds. turnabout charges attract each other, and this keeps the atom to packher. Atomic can and good turn The do of protons = The number of electrons The number of protons in an atom is called its atomic number. This number gives the atom its buns in the hebdomadary table. The potful number of an atom is the total number of particles in its nucleus. Mass number = Protons + Neutrons Protons= atomic number = place in periodic table Neutrons= mass number - atomic number Electrons: protons=atomic number=place in Periodic Table Electr ons Electrons move intot just fling anywhere around the nucleus. They spin in special regions called electron slips or energy levels. inward nail: 2 electrons can fit only adjacent shells: each stand up up to 8 electrons each. The inmost shells atomic number 18 postulateed first, and when these are filled, electrons fill the next shell and so on.

Valence shell: outmost electron shell Valence number: Number of electrons in outermost shell Compounds, Molecules and Latices Atoms do not always live on by themselves. Often atoms will chemically combine or uniting together to form a compound. Co mpounds can be classify as being composed o! f either discrete molecules or lattices. A molecule is a group of atoms bonded together. In a lattice, atoms keep bonding together to form spacious arrays. Mixtures A mixture can be separated by techniques such as filtration or evaporation since it is made of diametrical elements or compounds simply thrown together. Salt water, a cup of coffee, velvet drink, soil, air and blood are examples of mixtures. Period and Groups The group...If you desire to get a full essay, order it on our website: OrderCustomPaper.com

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