the concept conveyed in the diagram. Task 1 – Chemical Bonding and the Periodic Table In this task you have to describe atomic structure‚ outline the key features of the periodic table and describe chemical bonding Draw a diagram of a Calcium atom‚ label the key components of
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assignment especially in questions 2 ai) 2ci) & 3bi). Question 2 a) i & ii) b) i) The chemical formula of the compound containing only K+ and SO42- is K2SO4. ii) The formula of the simplest possible compound containing only C and I atoms is CI4. iii) K2SO4 was formed by ionic bonding and has overall regular/repeated crystal structure‚ it has a melting point of over 1000oc‚ ionic compounds like K2SO4 are also often soluble in water. CI4‚ in contrast‚ was formed by covalent bonding
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struture The basic building block of all matter is called an atom. Atoms are a collection of various subatomic particles containing negatively charged electrons‚ positively charged protons and neutral particles called neutrons. Each element has its own unique number of protons‚ neutrons and electrons. Both protons and neutrons have mass‚ whereas the mass of electrons is negligible. Protons and neutrons exist at the centre of the atom in the nucleus. Electrons move around the nucleus‚ and are arranged
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flowed like water‚ with smooth and fluid transitions from topic to topic. His main focus was the basic building block of all matter: the tiny atom and how it makes YOU. Those simple particles‚ bonded together in such a unique way that it can only create one individual: You. The author says‚ "To begin with‚ for you to be here now trillions of drifting atoms had somehow to assemble in an intricate and intriguingly obliging manner to create you. It’s an arrangement so specialized and particular that
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55.8g b) 1.06g x 1 mol = 0.0167 moles of copper produced 63.5g 3. a) 1.8 x 10-2 moles x 6.02x1023molecule x 1 atom = 1.1 x 1022 atoms of iron used 1 mol 1 molecule b) 1.67 x 10-2 moles x 6.02x1023 molecule x 1 atom = 1.01 x 1022 atoms of copper produced 1 mol 1 molecule 4. The ratio of moles of copper produced to moles
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model of the atom. (2.01) 10. What do we know about an atom if we know the atomic number? (2.02) 11. What does the atomic mass tell us about an atom? (2.02) 12. How many protons‚ neutrons and electrons are in an atom of Carbon? Explain how you determined them. (2.02) 13. How can an atom be electrically neutral? (2.02) 14. The atomic number of silver (Ag) is 47. A silver isotope has a mass of 108. How many electrons‚ neutrons and protons are in an atom of silver?
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total number of atoms for each substance. Substance Number and type of atoms a Mg(OH)2 d 2 NaOH e Al2(SO4)3 f Mn3(PO4)2 g 5 Pb(OH)2 h KMnO4 i NH4NO3 j NaClO3 k Zn(C2H3O2)2 l Total atoms Na2SO4 c / 24 H2O b 2 marks for each correct row 6 C6H12O6 2 Describe what the following chemical symbols and formulae represent. Symbol or formulae a OH1- b Polyatomic ion (hydroxide). One atom of oxygen bonded
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Paragraph 1 Perovskite‚ with a general formula of ABO3‚ has a structure comparable to that of ReO3. What differentiates them is the fact that ReO3 lacks the cation A at its unit cell centres. An octahedron made up of six oxygen atoms encompasses each rhenium atom‚ and it forms the 3-dimensional structure by connecting its corners with other octahedral. At low temperatures and a pressure of about 3kbar‚ the Fermi-surface cross sections undergo nonlinear patterns. ReO3 thus undergoes phase transitions
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Chemistry Atomic Structure: The Electron A myriad of trends occur on the periodic table‚ whether it is defined through the size of the atoms or the first ionization energy that may occur‚ many other trends can be found simply looking horizontally or vertically on to the table. As you look from left to right you can see that the reactivity of the elements increase‚ this is due to the number of electrons increasing on the shell. This also once you go down the table; the shells become further and
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Notes & Lesson Check 4.3 Atoms are composed of protons‚ neutrons‚ and electrons Protons and Neutrons make up the nucleus Electrons surround the nucleus Number of neutrons = (protons & neutrons) mass number – atomic number #26 – 28 are key points 26. What distinguishes the atoms of one element form the atoms of another? Elements are different because they contain different numbers of protons. 27. How do the isotopes of a given element differ from one another? Isotopes of an element
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