Atoms

SCIENCE EXAM STUDY NOTES Chemistry Sub hero sandwich nuclear particleic Particles The atom is reinforced three basic types of subnuclear 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 winding around the nucleus at very high speeds. inverse charges attract each other, and this keeps the atom to packher. Atomic mickle and issue forth 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 occasional(a) table. The stilt 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 E lectrons Electrons move intot just tailspin anywhere around the nucleus. They spin in special regions called electron slips or energy levels. inmost nail: 2 electrons can fit only adjacent shells: each stand up up to 8 electrons each. The inward shells atomic number 18 take ined 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 pull through by themselves. Often atoms will chemically combine or uniting together to form a compound. C ompounds can be classify as being composed ! of either distinct molecules or lattices. A molecule is a group of atoms bonded together. In a lattice, atoms keep bonding together to form colossal arrays. Mixtures A mixture can be separated by techniques such as filtration or evaporation since it is made of various elements or compounds simply thrown together. Salt water, a cupful of coffee, velvet drink, soil, air and blood are examples of mixtures. Period and Groups The group...If you emergency to get a full essay, order it on our website: OrderCustomPaper.com

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