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CHEMISTRY Atomic structure CHAPTER 1 (C1- All substances are made up of…
CHEMISTRY Atomic structure CHAPTER 1
C1- All substances are made up of atoms.
C3- A mixture is made up of two or more substances that are not chemically combined together.
C2- No new atoms are ever created or destroyed in a chemical reaction: THE TOTAL MASS OF REACTANTS = THE TOTAL MASS OF PRODUCTS.
C4- Paper chromatography separates mixtures of substances dissolved in a solvent as they move up a piece of chromatography paper. The different substances are separated because of their different solubility in the solvent used.
C1- Compounds contain more than one type of atom.
C1- The periodic table lists all the chemical elements, with eight main groups each containing elements with similar chemical properties.
C1- An atom has a tiny nucleus at its center, surrounded by electrons.
C1- Elements contain only one type of atom.
C2- There is the same number of each type of atom on each side of a balanced symbol equation.
C2- You can include state symbols to give extra information in balanced symbol equations. These are (s) for solids, (l) for liquids, (g) for gases, and (aq) for aqueous solutions.
C4- Fractional distillation is an effective way of separating miscible liquids, using a fractionating column. The separation is possible because of the different boiling points of the liquids in the mixture.
C3- Mixtures can be separated by physical means, such as filtration, crystallization, and simple distillation. (The physical techniques of separation include, fractional distillation, and chromatography).
C5- The ideas about atoms have changed over time.
C5- New evidence has been gathered from the experiments of scientists who have used their model of the atom to explain their observations and calculations.
C5- Key
ATOMS
SEPARATING MIXTURES
CHEMICAL EQUATIONS
FRACTIONAL DISTILLATION AND PAPER CHROMATOGRAPHY
HISTORY OF THE ATOM