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 atoms d. 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
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(−272.200 °C; −457.960 °F) to convert it to a solid. History • Noble gas is translated from the German noun Edelgas‚ first used in 1898 by Hugo Erdmann to indicate their extremely low level of reactivity. • The name makes an analogy to the term "noble metals"‚ which also have low reactivity. • Pierre Janssen and Joseph Norman Lockyer discovered a new element on August 18‚ 1868 while looking at the chromosphere of the Sun‚ and named it helium after the Greek word for the Sun‚ ήλιος (ílios
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6.02 x 10²³ number of particles in 1 mole of a substance 2. Empirical formula-simplest ratio of atoms of each element in a compound 3. 4. Model of an atom Particle Mass on relative atomic scale Charge Proton 1 1+ Neutron 1 0 Electron Very small (0.00055) 1- 5. Radioactive isotopes Radiation What is it? Relative charge How does the nucleus change? Stopped by? Deflection in electric field? Alpha α Helium nuclei ⁴₂He +2 2 fewer protons 2 fewer neutrons Paper or skin Low Beta β Electrons ₋₁°e
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with social phobia treated with citalopram or cognitive–behavioral therapy. Archives of General Psychiatry‚ 59‚ 425– 433. Goldin‚ P. R.‚ Manber‚ T.‚ Hakimi‚ S.‚ Canli‚ T.‚ & Gross‚ J. J. (2009). Neural bases of social anxiety disorder: Emotional reactivity and cog- nitive regulation during social and physical threat. Archives of General Psychiatry‚ 66‚ 170–180. Koszycki‚ D.‚ Benger‚ M.‚ Shlik‚ J.‚ & Bradwejn‚ J. (2007). Randomized trial of a meditation-based stress reduction program and cognitive–
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Daniel Alber AP Stats‚ Article 1‚ Cocaine Failure of Ritanserin to Block Cocaine Cue Reactivity in Humans 1. A double blind study was conducted measuring the effects of ritanserin on cocaine addiction. Both a placebo and ritanserin group were established. Both groups were given cocaine cues while measurements of their heart rate‚ skin temperature‚ and skin resistance were taken in two sessions‚ four weeks apart. Self reports (quantitative scales of qualitative characteristics such as mood‚
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SCH3U NAME:_______________ Combustion of Acetylene Materials Required: Large granules of Calcium Carbide Scoop or spatula to handle the calcium carbide 3 large test tubes of similar size with stoppers (held in large empty beaker) Wooden splint and lit candle Large beaker (500mL to 1L) half full of water Pre-lab Exercise: 1. In this lab we will produce acetylene by placing calcium carbide (CaC2) in water. Write the chemical formula for the reaction between calcium carbide
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Chapman et.al (2009) studied the local impact of hoisted point sources on late spring aerosol driving and cloud-aerosol cooperations‚ in northeastern North America‚ was studied by utilizing the WRF-Chem community model. The immediate impacts of mist concentrates on approaching sun powered radiation were recreated utilizing existing modules to relate aerosol sizes and chemical composition to airborne optical properties. Direct impacts were reenacted by including a prognostic treatment of cloud bead
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with high emotional reactivity seem to have high pathological symptoms however small number of children or youth are referred to treatment in response to their symptoms. In most cases these symptoms disappear with time but in some cases they remain to appear in long terms and act as precursor of the disorders. Along with emotionality/neuroticism there is another factor‚ which is the regulatory process of temperament commonly known as effortful control. high emotional reactivity combined with low effortful
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molecular weight compounds. 3) Identify that ethylene‚ because of the high reactivity of its double bond‚ is readily transformed into many suitable products The two bonds of ethylene are not identical. The second bond (pi-bond) is weaker than the first bond (sigma-bond). Thus‚ only a small amount of energy is needed to enter the system in order to convert a double bond into a single bond. This results in ethylene’s high reactivity. 4) Identify that ethylene serves as a monomer from which polymers are
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raclopride into the amygdala prior to the Pavlovian fear conditioning. They also investigated the effect of shock session attributed to a decrease in shock reactivity as a function of repeated shock exposure. Classical fear conditioning and acoustic startle testing were conducted in a single session allowing the concomitant assessment of shock reactivity with startle enhancement. (Grebba et al.‚ 2001) The potentiated startle‚ used as a behavioral indicator of fear and anxiety‚ and defensive
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