Variables: Independent variable: the mass of the beans Dependent variable: the different types of beans Control: The beans Purpose: The purpose of the lab is to find equal measurement of each type of bean. After you find the mass of each bean you need to find the relative mass of each bean. The navy bean will have the smallest relative mass. You will need to wear safety goggles and a lab apron and wash hands after the lab is finished. If you drop any beans pick them up immediately to prevent
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everywhere and inhabiting every crevice there is. These beings are known as atoms. These atoms create matter and the matter creates the world around. Throughout the years‚ individuals have been researching about the atom and the properties it holds. By researching about the atom‚ it has involved and formed many theories. There were many physicians who were significant people that contributed to the formation of the atom today. One of these physicians is named John Dalton. He should be considered
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reported? a. 420 b. 424 c. 423.7 d. 423 e. 423.6 10. Double and triple bonds form because a. The atoms involved have high electronegativities b. Single covalent bonds do not give all the atoms in the molecule 8 valence electrons c. One of the atoms in the molecule has more than 8 valence electrons d. The ions involved have charges larger than 1 e. There is at least 1 hydrogen atom involved in the bond 11. Expressing the answer in scientific notation with proper significant figures
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What sort of thing form in chemical reactions? Products are the finished product of a chemical equation‚ and reactants are what make up the products. ( atoms‚ matter‚ molecules‚ energy‚ rate‚ temperature) Name some compounds: H2O (Hydrogen and Oxygen elements - Water) CH4 (Carbon and Hydrogen elements - Methane) NaCl (Sodium Chloride- salt) Different types of compounds: Metal + Metal = Metallic Compound Metal + Non-Metal = Ionic compound Non-Metal + Non-Metal = Covalent compound Different types
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7&8 Gauge Sheet 7.1- Ions To find the number of valence electrons in an atom of a representative element‚ simply look at its group number. Atoms of metals tend to lose their valence electrons‚ leaving a complete octet in the next-lowest energy level. Atoms of some non-metals tend to gain electrons or to share with another non-metal to achieve a complete octet. The gain of negatively charged electrons by a neutral atom produces an anion. 7.2- Ionic Bonds and Ionic Compounds Although they are
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BIOLOGY TEST NOTES Biology is the study of life Living organisms share a set of characteristics that collectively set them apart from non-living matter Living organisms use molecules that contain instructions for building other molecules Living organisms gather energy and materias from their surrounding to: Build new biological molecules Grow in size Repair their parts Produce offspring All organisms are composed of the same macromolecules (proteins‚ fatty acids/lipids‚ carbs and nucleic
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Ionic Bonding Puzzle Lab Introduction When metals and non-metals chemically react‚ the atoms will tend to form ions or charged atoms. Ions form because electrons are either gained or lost. Metals will generally form cations or positive ions‚ since they tend to donate electrons Non-metals will form anions or negative ions‚ since they tend to accept electrons. Activity In this activity you will create models of ionic compounds and observe the chemical formula of the binary molecules you
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Chemistry: Atom structure theories Scientific research is a multistage and complicated process which requires many creative minds to contribute into its creation in order to be efficacious and present solid results. I’ve been given an information sheet apprising ideas of four scientists whose work was very significant in creating the theory about atom structure we recognise nowadays. Guiding Questions: 1 What significant contribution did each of the following people make to present ideas about the
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data acquired from the calculations‚ it was easy to find the the ratio of g-atoms of Mg to g-atoms of O: Data Mass of empty crucible - 36.2 grams Mass of crucible (with Mg) - 36.5 grams Mass of crucible (with O) - 37.3 grams Calculations Mass of Magnesium used - .3 grams Mass of reacted Oxygen - .8 grams Number of g-atoms of Mg used - .0125 Number of g-atoms of O reacted - .05 Ratio of g-atoms of Mg to g-atoms of O – 1:4 This means that for
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and Trends Atoms are microscopic particles that constitute all matter. Despite their tiny size‚ however‚ they can be measured. One way that certain atoms‚ called ions‚ are measured‚ is by ionic radius. The radius is different from an atomic radius and is influenced by the particles’ charges. Use the following information to understand this important measurement in chemistry. What is Ionic Radius? Ionic radius is‚ simply put‚ the radius of an ion. An ion is a charged particle. Atoms become ions
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