while others have to buy water or walk for miles to attain enough water to survive. In many cases water is being wasted. Hydrogen bonding holds water molecules together. At 32 degrees the kinetic energy is so low that the water freezes. When the temperature rises the kinetic energy thaws and we then have liquid water again. When the molecules absorb energy from the sunlight evaporation takes place and this is called water vapor which is
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nuclei of atoms in particular patterns. You will discover these patterns (and how electrons sometimes act like passengers boarding a bus) with the Electron Configuration Gizmo™. To begin‚ check that Lithium is selected on the PERIODIC TABLE tab. 1. The atomic number is equal to the number of protons in an atom. How many protons are in a lithium atom? ________3_____ 2. A neutral atom has the same number of electrons and protons. How many electrons are in a neutral lithium atom? ______3_______
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terrifying powerful explosive‚ as devastating as any other of the deadly explosive weapons of modern war. Had the war continued until the projected invasion on November 1‚ additional fire raids of B‑20’s would have been more destructive of life and property than the very limited number of atomic raids which we could have done in the same period. But the atomic bomb was more than a weapon of terrible destruction; it was a psychological weapon as well. The bomb served exactly the purpose we intended.
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Ngee Ann Polytechnic 6 Month Internship International Supply Chain Management Periodic Report 1 Brenda Lim S10093748J [pic] BA 090R Appendix 1 NGEE ANN POLYTECHNIC SCHOOL OF BUSINESS AND ACCOUNTANCY DECLARATION FORM (This form is to be submitted together with all reports) |Programme: |ISCM | |Module:
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that diatomic molecules make up majority of the Earth’s atmosphere? The prefix “di” means ‘’two’’ in Greek‚ so these diatomic molecules are made up of two atoms. In this lesson‚ we will discuss diatomic molecules and go over some examples. !!!What is a Diatomic Molecule? Diatomic molecules are all around us. The Earth’s atmosphere is mainly composed of about 78% oxygen and 21% nitrogen. The oxygen and nitrogen present in the atmosphere are both in the form of ‘’diatomic molecules’’‚ as shown below:
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Campbell’s Biology‚ 9e (Reece et al.) Chapter 5 The Structure and Function of Large Biological Molecules In Chapter 5‚ the principles of chemistry covered in earlier chapters are applied to the understanding of biological polymers and lipid membranes. The emphasis is on properly linking monomers and their polymers‚ and on the structural and functional diversity of the different polymer types. Particular attention is given to protein structure‚ because this is central to understanding subsequent
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It is in the d-block and it is a transition metal. Technetium is in the 7th group in the periodic table because it has 1 electron on its last shell. Also it is in the 5th period in the periodic table because it has 5 shells. Number of energy levels of Technetium is 5. Its electron shells are 2‚8‚18‚14‚1 as it is in the picture. Firstly‚ Russian chemist Dmitri Mendeleev‚ who is the creator of the periodic table‚ predicted Technetium’s existence. He called it eka-manganese because there was a missing
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PERIODIC CLASSIFICATION OF ELEMENTS Introduction There are 115 elements that are known at present. Some elements have similar properties whereas some others have completely contrasting properties Scientists began to look for some pattern in the properties of these elements Dobereiner’s triads In 1817‚ Johann Wolfgang Dobereiner‚ a German chemist‚ classified elements into groups based on their properties. He kept all elements having similar properties in one group. Most of his groups had three
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Over time many theories have been developed into the structure of the atom and what the world around us is composed of. Many scientists and philosophers have dedicated their life works into trying to understand how atoms work and what they are made up of‚ although not all theories have been accepted they have all come together to form what we know today. It all started from a Greek scientist called Democritus‚ who developed the idea that everything is made up of smaller things‚ which he named atomos
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Title: Benedict ’s test for Reducing Sugars Testable Question: Are all carbohydrates reducing sugars? Hypothesis: If the carbohydrate contains available ketone or aldehyde molecules then they are reducing sugars. Variables: a. Independent: Function groups react w/ reagent b. Dependent: Color change (red‚ orange‚ yellow) Control: Water Materials: - 4 mL of each solution (Water‚ Starch‚ Glucose‚ Maltose‚ Sucrose‚ Onion Juice‚ Potato slice‚ Milk) - 8 test tubes
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