This week we did a lot of things. When we came in on Monday we did a team bonding exercise. We first got into groups and elected a leader‚ recorder and timekeeper. The leader conducted interviews with us and everyone in the group got to know a little bit more about each other. The next activity we did was a human knot. We all has to join hands and then get untangled from each other. That activity made us get physically close but we had to communicate and we also laughed a lot. Anytime you laugh with
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Chemistry Summary The particle theory: 1. Matter is made of tiny particles 2. Particles of matter are in constant motion 3. Particles of matter are held together by very strong electric forces 4. There are empty spaces between the particles of matter that are very large compared to the particles themselves. 5. Each substance has unique particles that are different from the particles of other substances 6. Temperature affects the speed of the particles. The
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7.3-Bonding in Metals The valence electrons of metal atoms can be modeled as a sea of electrons. Metal atoms are arranged in very compact and orderly patterns. Alloys are important because their properties are often superior to those of their component elements. 8.1-Molecular Compounds Molecular compounds tend to have relatively lower melting and boiling points than ionic compounds. A molecular formula shows how many atoms of each element a molecule contains. 8.2-Covalent Bonding In covalent
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BONDING WITH THE EXTENDED FAMILY Syed Zafar Mahmood On the eve of filing nomination for the presidential poll a Mr Pranab Mukherjee was seen visiting and spending time with members of his extended family. This gesture gives a powerful message in favour of consolidating the kinship bond. God asked the Prophet to inform humanity‚ ’No reward do I ask of you‚ except the love of those near of kin’. To describe the wider group of extended relatives the Quran uses the term ’arhaam’‚ plural of ’rahm’
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Hwa Chong Institution (High School) Secondary 4 End of Year Examinations Chemistry Revision Notes List of topics: 1. Atomic Structure 2. Separation Techniques 3. Chemical Bonds and Bonding (Ionic‚ Covalent) 4. Metals 5. Properties and structures of compounds 6. Qualitative Analysis 7. Acids‚ Bases and Salts 8. Chemical Periodicity 9. Chemical Calculations 10. Air and Environment 11. Electrochemistry (Including Redox reactions) 12. Thermochemistry 13. Rates of Reaction 14. Chemical
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The bonding of an enzyme to its substrate forms an enzyme-substrate complex. The catalytic action of the enzyme converts its substrate into the product or products of the reaction. Each reaction is extremely specific‚ distinguishing between closely related compounds‚ including isomers. For example‚ the enzyme sucrase will only act on sucrose and will not bind to any other disaccharide. The molecular recognition of enzymes is due to the fact that they are proteins‚ which are defined as being macromolecules
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Chapter 6: Chemical Bonds Section 6.1: Ionic Bonding Chemical bond: the force that holds atoms of elements and ions together to become a stable‚ new substance called a compound. -the number of valence electrons determines if an atom will form a chemical bond. -metals tend to give up electrons to other atoms. -nonmetals tend to take electrons from other atoms. -noble gases will not form a chemical bond because these atoms already have a full outer shell of energy. Ionization: the
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one period all have the SAME NUMBER OF ELECTRON SHELLS. *Going ACROSS a period each element has ONE MORE PORTON and ONE MORE ELECTRON than the previous element. *Going ACROSS a period‚ the chemical properties of elements becomes LESS METALLIC AND MORE NON-METALLIC. ***GROUPS These are VERTICAL COLUMNS OF ELEMENTS .These are EIGHT groups numbered I to VII with the final group 0. *Each element in a group has the SAME NUMBER OF ELECTRONS IN ITS OUTER SHELL- for elements in Groups I to VII‚
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intermolecular forces (dipole-dipole‚ London dispersion‚ ionic‚ and hydrogen-bonding) from weakest to strongest . a) dipole-dipole‚ London dispersion‚ ionic‚ and hydrogen-bonding b) London dispersion‚ dipole-dipole‚ hydrogen-bonding‚ and ionic c) hydrogen-bonding‚ dipole-dipole‚ London dispersion‚ and ionic d) dipole-dipole‚ ionic‚ London dispersion‚ and hydrogen-bonding e) London dispersion‚ ionic‚ dipole-dipole‚ and hydrogen-bonding Ans: b 2. Hydrogen bonds account for which of the following observation
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[4]Hess’s Law [5]Determining Enthalpy [6]Heat Capacity [7]Calorimetry [8] Entropy [9] Gibb’s Free Energy [10] Waves [11] Quantum Theory [12] Quantum Numbers [13] Electron Configuration [14] Periodic Table [15] Periodic Trends KSev [16] Chemical Bonding [17] Formal Charge [18] Resonance Structure [19] Bonds [20] VSEPR [22] Valence Bond Theory [22] Molecular Orbital Theory [B]Lab [1] Corrosion [2] Oxidation Reduction Reactions [3] Calorimetry [4] Qualitative Analysis [5] Flame Test [6] Molecular Model
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