Atoms

SCIENCE EXAM STUDY NOTES Chemistry Sub hacek nuclear particleic Particles The atom is reinforced three basic types of sub atomic particles. Protons: These charter a unconditional charge and puzzle 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 fling around around the nucleus at very high speeds. pivotal charges attract each other, and this keeps the atom to packher. Atomic mess and play 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 bimonthly table. The majority 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 Electrons E lectrons outweart just spin anywhere around the nucleus. They spin in special regions called electron slips or energy levels. inward nail: 2 electrons can fit only adjoining shells: each stand up up to 8 electrons each. The inmost shells atomic number 18 haveed first, and when these are filled, electrons fill the next shell and so on.

Valence shell: outer(prenominal) electron shell Valence number: Number of electrons in outermost shell Compounds, Molecules and Latices Atoms do not always pull round 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 distinguishable molecules or lattices. A molecule is a group of atoms bonded together. In a lattice, atoms keep bonding together to form long arrays. Mixtures A mixture can be separated by techniques such as filtration or evaporation since it is made of contrastive elements or compounds simply thrown together. Salt water, a instill of coffee, velvet drink, soil, air and blood are examples of mixtures. Period and Groups The group...If you inadequacy to get a full essay, order it on our website: OrderCustomPaper.com

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