|WEEK |LEARNING OBJECTIVES |LEARNING OUTCOMES |ACTIVITIES |REMARKS | |1 |FORM 4 ORIENTATION | | |4/1 – 6/1 |
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AP BIO REVIEW ~ UNIT 1 BIOCHEMISTRY ELEMENTS‚ COMPOUNDS‚ ATOMS‚ MOLECULES‚ IONS AND BONDS Matter: anything that has mass and takes up space Element: matter in its simplest form Compound: two or more elements combined in simple whole number ratios of atoms Atom: the smallest form of an element that still displays its particular properties Consists of a nucleus of positively charged protons and neutrally charged neutrons an electron cloud of negatively charged electrons An atom is
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Electron-Pair Repulsion (VSPER) theory. The following are the sets of rules summarizing thsi theory: ● Consider molecules and ions where two or more atoms are bonded to a central atom. ● The electron pairs in the valence shell of the central atom are assumed to position as far apart as possible because electron pair repels one another. The shape of the molecule or ion is a result of the electron-pair repulsion. ● All the valence-shell electron pairs of the central atom are considered both the
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would have to gain two electrons in order to achieve a noble gas electron configuration? O Sr Na Se Br A) Sr B) Br C) Sr‚ O‚ Se D) Na E) O‚ Se 3. The electron configuration of the S2- ion is __________. A) [Ne]3s23p2 B) [Ne]3s23p6 C) [Kr]3s22p-6 D) [Ar]3s23p2 E) [Ar]3s23p6 4. The ion NO- has __________ valence electrons. A) 10 B) 16 C) 12 D) 14 E) 15 5. The Lewis structure of PF3 shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron
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Chemical Nomenclature refers to the naming systems used with chemical formulas. This worksheet focuses on the most basic chemicals and nomenclature systems. Please read the information concerning each problem set and then attempt the problems associated with that information. The simplest compounds contain just two elements. Sodium chloride‚ NaCl‚ is an example of a binary compound. Several other examples are listed below. Potassium bromide KBr Calcium bromide CaBr2 Lithium fluoride LiF
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the factors which affect its lytic activity. The assay method reported by Smolelis and Hartsell (1949) has been found to be accurate and highly adaptable to the study of this enzyme. This report concenms its application to the effect of pH‚ salts‚ ions‚ temperature‚ and manner of preparation of the cell suspension‚ on the activity of lysozyme. MATERIALS AND METHODS Preparation of the cell suspension. To expedite the testing of lytic activity by lysozyme ’and to reduce the possibility of daily
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Topic 1.2 AMOUNT OF SUBSTANCE The mole Reacting masses and atom economy Solutions and titrations The ideal gas equation Empirical and molecular formulae Ionic equations Mill Hill County High School THE MOLE Since atoms are so small‚ any sensible laboratory quantity of substance must contain a huge number of atoms: 1 litre of water contains 3.3 x 1025 molecules. 1 gram of magnesium contains 2.5 x 1022 atoms. 100 cm3 of oxygen contains 2.5 x
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the nitrate ion is an excellent oxidizer‚ and it will oxidize Ag(s) to Ag+(aq) and Cu(s) to Cu2+(aq). The reduction product is the gas NO. As the colorless nitrogen monoxide gas forms‚ it immediately reacts with the oxygen in the air to produce the orange-brown gas N02. The half-reactions for the oxidation of silver and copper by nitric acid are as follows: Ag(s) → Ag+(aq) + e- Cu(s) → Cu2+(aq) + 2e- 4H+(aq) + NO3- (aq) + 3e- → NO(g) + 2H2O(l) Once the silver and copper ions are in solution
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important for plant fertilizers since potassium helps plant growth. The metal halides form white ionic crystalline solids. They are all soluble in water except LiF because of a high lattice enthalpy due to the electrostatic attraction between Li+ and F- ions. All halogens are quite reactive‚ and in the natural world they always occur combined with other elements. Fluorine reacts so readily with almost any substance it contacts that chemists were not successful in isolating pure fluorine until. Chlorine
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into component ions other than H+ and OH-. 4. Ions that conduct an electrical current in solution are called _________________. 5. A hydrogen atom has (one/zero) proton(s)‚ (one/zero) electron(s)‚ and (one/zero) neutron(s). 6. A hydrogen ion has (one/zero) proton(s)‚ (one/zero) electron(s)‚ and (one/zero) neutron(s). 7. Acids are substances that (release/accept) hydrogen ions. 8. Bases are substances that (release/accept) hydrogen ions. 9. The bicarbonate ion is an important
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