of a book or article) that you used to help you answer the question. 1. Which type of compound usually has higher melting points‚ ionic compounds or covalent compounds? What is the reason for this difference in melting points? (3 points) 2. Do ionic compounds conduct electricity as: (3 points) a. Solids? b. Liquids? c. Aqueous solutions (when the ionic compounds are dissolved in water)? 3. Do covalent compounds conduct electricity as: (3 points) a. Solids? b. Liquids? c. Aqueous
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Topic 4 - Bonding 4.1 Ionic bonds 4.1.1 Ionic bond: +ve (cations) and -ve (anions) ions are attracted to each other and form a continuous ionic lattice 4.1.2 Group 1 metals form +1 ions‚ group 2 metals form +2 ions‚ metals in group 3 form +3 ions . Examples : Li+‚ Mg2+‚ Al3+. Greater ease of ionisation Li->Cs is due to the increased electron shielding of the nuclear attraction caused by additional inner shells of electrons. The easier atoms are to ionise‚ the more reactive they
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types of bonds that I have learned about in the bonding comparison lab. These bonds include ionic‚ polar covalent‚ and non-polar covalent. Each of these bonds and the element compounds connected to them has individual solubility‚ conductivity‚ melting point‚ and volatility levels. The three element compounds that will follow are sodium chloride‚ sucrose‚ and p-dichlorobenzene. Sodium chloride is an ionic bond. It is soluble in water‚ but is not soluble in heptane. Sodium chloride has a high melting
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The pantheon is made up of two principal parts; the porch; which is a highly idealised and more greek interpretation and the circular building which is much more Roman in it’s display. The pantheon follows traditional Roman architecture designed with a portico held up by eight Corinthian columns almost 12m high. The monolithic columns shafts are made of Aswan grey granite contrasted with the white pentelic marble of the capitals.The porch is supported by these Corinthian columns and is made out
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Greek and Roman both share similarities‚ but have different characteristics and use different construction types. Greek architecture used Post and- Lintel construction‚ while Roman construction dominated in arches‚ domes and vaults. Post and- Lintel construction is evident in the buildings that make up the Acropolis in Greece‚ including the Pantheon and the Temple of Hera‚ which used drums to create columns or rows of columns that used fluting and tapering to make the columns appear to perfectly
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To avoid any confusion concerning the symbol for litre‚ dm3 will be used in place of l or litre.Valence electrons are known as valency electrons for this test. Nature of Matter The states of matter are solid‚ liquid‚ and gas‚ in respective order of kinetic energy. State of Matter | Definite Volume | Definite Shape | Solid | Yes | Yes | Liquid | Yes | No | Gas | No | No | Diffusion: the process in which particles mix by colliding randomly
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Bibliography: Irwin‚ Debbie‚ Patrick Garnett and Ross Farrelly. Chemistry Contexts: Preliminary‚ 2nd Ed. Melbourne: Pearson Education Australia‚ 2006. Print. "Ionic vs. Covalent Substances - Hands-on Classification MiniLab." Ionic vs. Covalent Substances - Hands-on Classification MiniLab. N.p.‚ n.d. Web. 24 Mar. 2013. <http://www.learningfront.com/mergenthaler/pages/upshur_1.html>.
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The substances were identified according to their properties. Paraffin wax was identified as a non-polar covalent solid‚ sucrose is a polar covalent‚ sodium chloride was acknowledged as an ionic solid‚ tin is a metallic solid‚ sand is a network covalent‚ unknown#1 is a non-polar covalent solid‚ unknown#2 is an ionic solid‚ and unknown#3 is a polar covalent solid. These conclusions were made based on their physical and chemical properties. Introduction Solid substances are classified by the types
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Chapter 7 Matching Match each item with the correct statement below. a. halide ion e. valence electron b. octet rule f. coordination number c. ionic bond g. metallic bond d. electron dot structure ____ 1. an electron in the highest occupied energy level of an atom ____ 2. Atoms react so as to acquire the stable electron structure of a noble gas. ____ 3. a depiction of valence electrons around the symbol of an element ____ 4. an anion of chlorine or other halogen ____ 5. the force of attraction
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very‚ very polar. It is the latter which take on some of the characteristics of an ionic bond. The ionic and covalent bonds are known to be the strongest chemical bonds. An ionic bond forms when two atoms differ so much in electronegativity that one or more electrons are actually transferred from one atom to the other. Ionic bonds generally occur between a metal and a nonmetal. Due to the existence of ionic bonds‚ elements that normally would not combine because sharing electrons is either
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