Honors Chemistry Notes Unit 1 • Matter- Anything that has mass and volume and anything that has the property of inertia. -Quantitative. -Can be solid‚ liquid‚ gas. • Inertia- Ability to resist changes in its motion. -Change in motion could be terms of speed or distance. -A car that moves after it has stopped. • Mass- The amount of matter in an object. -The balances that you use in laboratory measure mass‚ not weight. -SI unit is kilogram (kg). • Conservation of Mass- The law states that
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Subject: Chemistry Topic: The Periodic Table The periodic table is a classification of all the elements based on ATOMIC NUMBER. It is composed of HORIZONTAL PERIODS and VERTICAL GROUPS which contain the elements arranged: *the order of INCREASING ATOMIC NUMBER *in the relation to the ELECTRON STRUCTURE of the atoms *in the relation to their CHEMICAL PROPERTIES (Criteria Used For Placing ELEMENTS in the Periodic Table) 1. ATOMIC NUMBER 2. NUMBER OF SHELLS (PERIOD) 3. NUMBER OF OUTER
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CHEMISTRY SAMPLE PAPER - I CLASS - XII Time : Three Hours Max. Marks : 70 General Instructions 1. All questions are compulsory. 2. Question nos. 1 to 8 are very short answer questions and carry 1 mark each. 3. Question nos. 9 to 18 are short answer questions and carry 2 marks each. 4. Question nos. 19 to 27 are also short answer questions and carry 3 marks each 5. Question nos. 28 to 30 are long answer questions and carry 5 marks each 6. Use log tables if necessary‚ use of calculators is
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Chemistry 2202 Review Final Exam Chapter 2: The Mole 1. Isotope – atoms of an element that have the same number of protons but different numbers of neutrons. Ex. The three forms of oxygen are called oxygen-16‚ oxygen-17‚ and oxygen-18. They all have 8 electrons and are written as 16/8 O (8 protons + 8 neutrons)‚ 17/8 O (8 protons + 9 neutrons)‚ and 18/8 O (8 protons + 10 neutrons). 2. 3. Mass Number – the sum of the protons and neutrons in the nucleus of one atom of a particular
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1 Class XII Chemistry Ch 5: Surface Chemistry Chapter Notes Top Concepts / Key learnings: 1. 2. 3. 4. 5. 6. Adsorption: The accumulation of molecular species at the surface rather than in the bulk of a solid or liquid is termed as adsorption. Adsorbate: The substance which is being adsorbed on the surface of another substance is called adsorbate. Adsorbent: The substance present in bulk‚ on the surface of which adsorption is taking place is called adsorbent. Desorption: The process of removing an
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* Introduction to Organic Chemistry Understand the basis of drawing organic structures Depicting 3-D structures in 2-D Most organic compounds have a three-dimensional structure. How do we represent structures on our two-dimensional page? For example‚ methane is a tetrahedral molecule: Bonds in the plane of the paper: Bonds coming towards the observer: (out of the page) Bonds going away
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A student was assigned a certain task by his teacher in chemistry lab. During the experiment‚ student dropped the flask containing 250 ml‚ 3 molar NaOH solution. Due to this 50 ml of solution out of 250 ml‚ had fallen on the floor. Thinking that teacher may punish him for this mistake‚ he replenished the left over solution with 50 ml of water. The new molarity of NaOH solution will be. (A) 2M (B) 3M (C) 2.5 M (D) 2.4 M 2.* Which of the following molarity values of ions in a aqueous solution
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ultra-visible spectroscopy hence the Chrysophyllum canito leaf extracts silver synthesized sample had given for scanning electron microscope to find out the approximate size of synthesized silver nanoparticles‚ energy-dispersive X-ray spectroscopy is an analytical instrument to identify the present of element in synthesized silver nanoparticles sample silver weight‚ atomic number and other element iterations identified and X-ray diffraction spectroscopy found the crystallite size
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4 = 6.9/ 7 * The atomic mass is the mean of all the isotopes of Lithium in nature; round the number * Isotopes of a specific element have a varying number of neutrons * The number of neutrons do not affect the chemistry because they are not electrically active; neutral * Mendeleev organized the elements according to their atomic mass but today we organized them according to their atomic number * Staircase line separates the metals from the non-metals
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Why should we study Chemistry? Well I’ll tell you why I think I would study Chemistry‚ why it’s so important and crucial to know and understand. A couple reasons why are that I want to become a doctor in the future‚ I can see Chemistry in life‚ and I want to make a difference in the world. Can’t you agree that Chemistry is everywhere you look‚ I would definitely say so? Clearly‚ then we can see Chemistry in our daily lives. Just stop and look around you sometime. Look at a car for instance‚ you
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