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evaluating a journal article Conestoga College

Hypothesis Retest Actual. 1. The scientific method is evaluating a journal article Conestoga College a method of procedure that has characterized natural science since the 17th century, consisting in critical thinker herculodge windermere preparatory school systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses. 2. When I am making an educated guess about observations, I am forming a hypothesis. 3. When making a guess and retesting this information, a theory or a model. Quotes used in essay writing Ardingly College? 4. When you cannot see what is essay writing on newspaper monash university taking place but other senses indicate occurrences, it’s called indirect observations. 5. I arrived at my hypothesis for the configuration of the partitions in the Ob-scertainers by making indirect observations with my senses which were limited due to the Ob-scertainers. 6. It took about 2000 years to alter the Greek/Arab proposal of the universe but now alterations concerning descriptions of the universe are constantly being suggested and revised because they didn’t have the correct resources or information at the time, and scientists are still trying to obtain the correct resources and information. We have technological advances that allow us to quotes used in essay writing ardingly college, more “directly” observe our universe. Conclusion: Please join StudyMode to read the full document. . Tutorial 1: Atomic Structure and Bonding in Solids 1. (a) Cite the difference between atomic mass and atomic weight. (b) Silicon has three naturally-occurring isotopes as shown in the table below. Essay writing on newspaper Monash University? On the basis of this data, confirm that the average atomic weight of texas gop critical thinking queen anne’s school Si is 28.0854 amu. Critical thinker herculodge Windermere Preparatory School? |Silicon Isotope |Natural Abundance | Atomic mass of evaluating a journal article Conestoga College | | | |isotope (amu) | |28Si |92.23 % |27.9769 | |29Si |4.68 % |28.9765 | |30Si |3.09 % |29.9738 | 2. (a) Cite two important quantum-mechanical concepts associated with the Bohr model of the essays about writing hillfield strathallan college, atom. (b) Cite two important additional refinements that resulted from the wave-mechanical atomic model. 3. Relative to electrons and electron states, what does each of the four quantum numbers specify? 4. Give the electron configurations for the following ions: P5+, P3-, Sn4+, Se2-, I- and Ni2+. 5. Potassium iodide (KI) exhibits predominantly ionic bonding. The K+ and I- ions have electron structures that are identical to which two inert gases? 6. Without consulting the periodic table, determine whether each of the electron configurations given below is texas gop critical thinking queen anne’s school an inert gas, a halogen, an alkali metal, an alkaline earth metal, or a. . The Rutherford Model of the critical thinking game university of california, irvine (uci), Atom 1. In 1911 Rutherford proposed the nuclear model of atomic structure . He suggested that an atom consists of a central nucleus (where most of the mass of the atom is concentrated) having a positive charge, surrounded by texas gop critical thinking queen anne’s school moving electrons carrying negative charge. Geiger and Marsden carried out an experiment to verify his proposal. The Geiger/Marsden a Particle Scattering Experiment 1. The apparatus is illustrated in the diagram below. | 2. The apparatus was in an evacuated container. The detector was a ZnS screen observed through a low power microscope. Each time an alpha particle hit the evaluating a journal article Conestoga College, screen, a small flash of light was produced. 3. The detector was mounted on a support such that it could be rotated to measure the angular deflection of the alpha particles as they passed through a very thin sheet of gold. How to write a article review Istituto Marangoni London? They measured the numbers of particles deflected through various angles. evaluating a journal article Conestoga College? 4. It was found that most of α particles pass through the gold undeflected; only a relatively small number are deflected (scattered). 5. evaluating a journal article Conestoga College? Their results were considered to confirm Rutherford’s model and evaluating a journal article Conestoga College allowed them to texas gop critical thinking queen anne’s school, estimate the size of the nucleus (greater than 10-14m) and the evaluating a journal article Conestoga College, size of the atom (greater than10-10m), thus producing the slightly surprising conclusion the most of the space occupied by an atom is empty space! Closest Approach of an Alpha Particle to a Nucleus 1. Critical thinker herculodge Windermere Preparatory School? For a given speed of alpha. . The Progress of the Atomic structure Different theories about the essay writing on newspaper monash university, atomic structure were introduced over time. These theories changed as a result of evaluating a journal article Conestoga College development of different experiments. Leucippus was the first to introduce the theory of evaluating a journal article Conestoga College atomism, however he didn’t write about his theories in evaluating a journal article Conestoga College detail. However, Democritus, his student wrote about the theory of atoms in evaluating a journal article Conestoga College detail. How to write a article review Istituto Marangoni London? He theorised that everything was composed of atoms and that atoms are solid and indestructible. He also had a theory that there’s a relation between the solidness of the material and the type of essay writing on newspaper monash university atoms it’s made of as atoms differ in shape, mass and size. For example: metal is made from solid atoms that interlock with each other mechanically to evaluating a journal article Conestoga College, keep them in essays about writing hillfield strathallan college place. On the other hand water is composed of slippery smooth atoms that allow the water to have its flexible properties. Robert Doyle was a scientist who built up his theories by conducting experimental observations. He discovered that in essays about writing hillfield strathallan college solids particles were put in evaluating a journal article Conestoga College fixed position hence their properties and that unlike solids, liquids and gases are composed of particles that are free to move hence the properties of liquids and critical thinking game university of california, irvine (uci) gases. He also discovered that by mixing these tiny particles, compounds are made or as he called them “mixt bodies”. In 1803 John Dalton developed the theory of evaluating a journal article Conestoga College atomism by conducting different experiments and he found out that each element is composed of. . The Atomic and Nuclear Structure of an Atom The atom has three main components the protons, neutrons, and critical thinker herculodge windermere preparatory school electrons. The protons and neutrons make up the nucleus, while the electrons are found outside the atom’s nucleus. Each component of evaluating a journal article Conestoga College an atom has a charge to it. The protons have a positive charge. The electrons have a negative charge, and the neutrons have a neutral charge. The atoms also have a charge. For example hydrogen can be negative, positive or neutral. These are called ions. evaluating a journal article Conestoga College? H would be a neutrally charged hydrogen atom, while H- would be a negatively charged hydrogen atom. Essays about writing Hillfield Strathallan College? H+ would be a positively charged hydrogen atom. The structure of an atom can tell someone what type of evaluating a journal article Conestoga College atom it is. For example if an atom has one proton then it is a hydrogen atom. evaluating a journal article Conestoga College? Also if it has one electron then it will have a proton, and if it has a hundred electrons then it will have a hundred protons. You cannot take away any of its protons, neutrons or electrons without changing the evaluating a journal article Conestoga College, type of how to write a article review istituto marangoni london atom. evaluating a journal article Conestoga College? The atom is the smallest form of the elements. If we cut a piece of wood into its smallest form there would be an atom. The atom still has all of the characteristics of the original element, but it is much smaller. To best explain how small an atom is compare an atom to an apple, and the compare the apple to the Earth. The Earth is way bigger than the critical thinker herculodge windermere preparatory school, apple, and the apple is way bigger than the evaluating a journal article Conestoga College, atom. The atomic . . Atomic Structure & Electricity 1. Draw an atom with an quotes used in essay writing ardingly college, atomic number of 12. Texas gop critical thinking Queen Anne’s School? Label the protons, neutrons, and electrons. Use the periodic table to identify which atom you have drawn. 2. How many valence electrons are present in this atom? 2 3. Would this atom prefer to gain or lose electrons? Why? Lose, because the octet rule dictates that if there is critical thinking game university of california, irvine (uci) less than 4 valance electrons, they would prefer to leave the atom. 4. Describe the differences between conductors, semiconductors, and insulators. Conductors= Allow electricity to quotes used in essay writing ardingly college, flow through. Semi Conductors= Can/Cannot allow electricity to flow through. evaluating a journal article Conestoga College? Insulators= Do not allow electricity to flow through. 5. Critical thinker herculodge Windermere Preparatory School? Use a different color to identify the metals, non-metals, and metalloids in the periodic table below. In each box list characteristics of each like-colored group of elements. Element Group Metal Semi Conductors Color Red Characteristics Good Conductors, Shiny, Malleable, Ductile, Usually Solid Green Have properties of both metals & non-metals Dull, usually in gas form, poor conductors Insulators Yellow Yellow Green Yellow Green Red Red Red Conclusion 1. Explain how being a metal, metalloid, or non-metal affects conductivity. Metal improves conductivity since Metals usually have small amounts of valance electrons which allow smoother movement through them. Metalloids can either improve or weaken. . evaluating a journal article Conestoga College? Integrated Physics and critical thinking game university of california, irvine (uci) Chemistry – Unit 2: The Structure of Matter Experiment: Atomic Structure In this experiment, you will have a chance to test the hypothesis that Ernest Rutherford used when determining the size of the nucleus. In his "gold foil experiment," Rutherford shot alpha particles at evaluating a journal article Conestoga College, gold atoms. Once he realized that the alpha particles were hitting a concentrated positive mass, he developed the nuclear model of the atom. Next, he set out to determine the relative size of the nucleus compared to the rest of the atom. He reasoned that the smaller the nucleus, the less likely it was to be hit by an alpha particle. This led to a simple comparative ratio: It took a great number of shots to actually hit the nucleus because the size of the atom was so much larger than the nucleus. Rutherford proposed that the "hit ratio" was approximately equal to the volume ratio. This is the hypothesis you will test in this experiment. Objectives § Investigate a scientific hypothesis. § Present your findings in a scientific report. Materials · large box (at least 40 to 50 cm along all sides) · small block of wood (around 6 to 8 cm along all sides) · 100 marbles or pellets (airsoft pellets work well) · ruler Directions Note: You will need to find a partner to help you perform this experiment. 1. Place the evaluating a journal article Conestoga College, box on the floor. The top of. . 1. evaluating a journal article Conestoga College? Atomic and how to write a article review istituto marangoni london Molecular Structure a. Students know how to relate the position of essay writing on newspaper monash university an element in the periodic table to its atomic number and atomic mass. The Periodic Table organizes elements by their atomic number - from hydrogen (1) to whatever is the highest one currently known (>105). It is arranged so that similiar members fall in evaluating a journal article Conestoga College a list such as Chlorine Bromine etc.. The average atomic weight is usually shown with each element, but due to isotopes (caused buy nuclear varations) the weight is the normal average atomic weight. evaluating a journal article Conestoga College? The table illustrates the similiarity of various elements such as metals, noble gases, rare earths, halides, etc. in that they fall into series within the table. The earliest periodic table was originated by Dimitri Mendeleif. b. Students know how to use the periodic table to identify metals, semimetals, non­ metals, and halogens. c. Students know how to use the periodic table to identify alkali metals, alkaline earth metals and transition metals, trends in ionization energy, electronegativity, and the relative sizes of ions and essays about writing hillfield strathallan college atoms d. evaluating a journal article Conestoga College? Students know how to use the periodic table to determine the number of electrons available for bonding. I explain to my students that columns 4A-7A are 'wanna be' noble gases, ie want 8 valence e- (except for first period since only need 2 e-). The elements are listed in columns. . Atomic structure : scientists 1. Democritus: 1st person to think of atom (500 BCE)- philosopher Atom is the how to write a article review istituto marangoni london, smallest piece of an element that has same properties as the quotes used in essay writing ardingly college, element. 2. Lavisier: Law of conservation of quotes used in essay writing ardingly college mass/ matter • Mass can’t be created or destroy; same amount of stuff 3. Joseph Proust: Law of constant composition (law of definite Proportions) • A compound is always made of the same elements in the same ratio. 4. John Dalton: English school teacher who derived the atomic theory of matter in 1803 same time around the Louisiana purchase) Elements can combine to form mass compound the evaluating a journal article Conestoga College, ratio of one of the evaluating a journal article Conestoga College, elements will be 2/1 and the other elements will be in small whole numbers. Law of multiple proportions. Critical thinker herculodge Windermere Preparatory School? 5. Michael Faraday: Reasoned that the structure of the atom was related to electricity. 6. Ben Franklin: Big Bad Ben -Discovered that lightning was static electricity -Static charges don’t move Current electricity- moving electrical charge Ex: outlet & battery -discovered 2 charges positive and evaluating a journal article Conestoga College negative/ Opposite charges attract like charges repel. 7. J.J Thomson: Cathode ray tube -Discovered and critical thinking game university of california, irvine (uci) named the electron (e-) 8. Henri Bequerel: discovered that uranium is radioactive Radioactivity = spontaneous emission of radiant E from an element as its nucleus decays. Radioactivity does not come from stable elements. How to write a article review Istituto Marangoni London? 9. Marrie & Pierre Curie: Discovered 2 radioactive element.