Test #2 ANSWERS CHM 101 Part I Multiple Choice (2 points each) 1. Which element is most likely to form three covalent bonds? A) C B) Si C) P D) S E) Se 2. A chemical bond formed when two atoms share two pairs of electrons is a ________ bond; it is best described as ________. A) double; covalent B) double; ionic C) single; covalent D) single; ionic E) triple; covalent 3. Which property could describe a covalent compound? A) It conducts electricity when melted. B) Has a low boiling
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Chemistry Research Task The Periodic Table of Elements The Periodic Table of Elements is used as a way of displaying all the known chemical elements; it is accepted and used all over the world. The periodic table’s layout is very well structured; it consists of vertical rows called groups and horizontal rows called periods. It is one of the most important resources in chemistry and the key to discovering new elements. The beauty of the Periodic Table is that a lot of information about any
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Chemistry A Bonding Worksheet #1: Introduction to Ionic Bonds The forces that hold matter together are called chemical bonds. There are four major types of bonds. We need to learn in detail about these bonds and how they influence the properties of matter. The four major types of bonds are: I. Ionic Bonds III. Metallic Bonds II. Covalent Bonds IV. Intermolecular (van der Waals) forces Ionic Bonds The ionic bond is formed by the attraction between oppositely charged ions.
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shell which makes it a likely contender for a couple of Hydrogen atoms to share with. In a covalent bond like this though‚ another property needs to considered‚ electronegativity. Electronegativity is the ability to steal electrons away from other atoms. So how would an atom with high electronegativity and an atom with low electronegativity be able to share electrons? Polarity occurs between the atoms causing the electrons to not completely leave the less electronegative atom‚ but instead makes it
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The Periodic Properties of Atoms The Periodic Table: In the 1870’s‚ the Russian chemist Mendeleev developed the periodic table‚ based upon the relationship between the atomic weights of the elements and their chemical properties. As one ascends from lightest to heaviest elements‚ there is a periodic recurrence of chemical properties. For example‚ the elements with atomic numbers 2‚ 10‚ 18‚ 36‚ 54‚ and 86 all are chemically inert (the noble gases)‚ while those with atomic numbers one greater 3‚ 11
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Linus Pauling is said to be one of the most significant scientists to have ever lived. Given Pauling’s wide array of accomplishments‚ ranging from winning the nobel peace prize to solving complex atomic structures‚ it is easy to see why he has earned the respect of so many in the scientific community. Pauling was born on February 28‚ 1901 in Portland‚ Oregon. Even as a young boy he took interest in science; a friend introduced him to a toy chemistry set‚ and instantly young Linus was hooked and began
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Chemistry Review sheet: Unit 1- Lesson 1‚ 2 *Key notes to keep in mind* ü Metals have a high low ionization energy ü Non-metals have a high electron affinity · Atom: The basic unity of an element which still retains the elements properties · Atomic number: the unique number of protons in the nucleus of a particular element · Isotope: Atoms of the same element which contain a different number of neutrons · Periodic law: The chemical
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The oxidation states in a metal- nonmetal are simple to determine because they are given oxidation states similar to their charges. However‚ when two nonmetals react; the situation is a bit more complex. As all nonmetals have similarly high electronegativity values‚ it is unreasonable to assume that there will be a transfer of electrons between them in an oxidation-reduction reaction. In these instances the valence electrons are transferred moving closer to that atom which has the higher
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shells. 4.1.5 The ionic or covalent nature of the bonding in a binary compound is a result in the difference between their electronegativity. NaCl(s) is ionic‚ HCl(g) is (polar) covalent (note: covalent molecules tend to be gases/liquids‚ ionic tends to be solid‚ although network covalent would be solid). In general‚ if the difference between electronegativities is greater than 1.7‚ the bond will be more than 50% ionic. 4.1.6 Take the name of the group 1‚2‚ or 3 metal and add ‘fluoride’
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Chem 201 /HW#10 Chapter 9 Electronegativity Table: use this table to answer Q [pic] 1. Bromine tends to form a monatomic ion which has the electronic configuration of a noble gas. What is the electron configuration of that noble gas? a. 1s2 2s2 2p6 3s2 3p6 3d10 4p6 b. 1s2 2s2 2p6 3s2 3p6 4p6 4d10 c. 1s2 2s2 2p6 3s2 3p6 4s2 4p6 d. 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 e. 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 2. Which ion of
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