1 lone pair, bent C. 2 lone pairs, bent D. 3 lone pairs, bent E. 3 lone pairs, linear 60. The geometry of the SF4 molecule is A. tetrahedral B. trigonal pyramidal. C. trigonal planar. D. square planar. E. distorted tetrahedron (seesaw).
CH4 4+4(1)=8 H H C H H 1. What is the central atom? (1 point for each molecule) The central atom is C. 2. How many atoms are bonded to the central atom? (1 point for each molecule) There are four atoms bonded to the central atom.
Name___________________________________ periodic table review 3 12/5/2006 Page 1 Key Terms 1. What is the name of the family of elements in Group IA/1? a. alkali metals b. alkaline earth metals c. halogens d. noble gases e. none of the above 2. What is the name of the family of elements in Group IIA/2? a. alkali metals b. alkaline earth metals c. halogens d. noble gases e. none of the above 3.
Write the Molecular Formula for Each of the Following: a. A compound with a molecular mass of 70g/mol and an empirical formula of CH2. b. A compound with a molecular mass of 46.0g/mol and an empirical formula of NO2 Molecular Formula Worksheet Write the molecular formulas of the following compounds: 1) A compound with an empirical formula of C2OH4 and a molar mass of 88 grams per mole. 2) A compound with an empirical formula of C4H4O and a molar mass of 136 grams per mole.
B. C. D. MA.912.G.7.5 6. A solid-glass sphere is cast with a radius of sphere? A. B. C. D. . What is the volume, to the nearest whole number, of this MA.912.G.3.3 7.
6. Copper has two stable isotopes,[pic]and [pic], with masses of 62.939598 amu and 64.927793 amu, respectively. Calculate the percent abundances of these isotopes of copper. 7. Chromium has four naturally occurring isotopes: chromium – 50 (4.35% at 49.946 amu) chromium – 52 (83.79% at 51.941 amu) chromium – 53 (9.50% at 52.941 amu), and chromium – 54 (2.36% at 53.939 amu) Calculate the average atomic mass of
4) When naming an ionic compound, which ion is given first? The metal ion is named first 5) Give explanations for the following: a. Argon will not react with any other element It already has a complete number of eight, a full number in its valance shell so it cannot react with itself or another element b. The reaction between sodium chloride gives out a lot of heat and light. The chemical energy of the product is less then the chemical energy of the reactants. This energy is indestructible and is converted to light and heat.
$17.50 B. $7.00 C. $28.00 D. $42.00 3. The quotient of 794.1 divided by 7.61, expressed to two
Calculate the value of Ke for this system. 2 H2S (g) === 2 H2 (g) + S2 (g) [1.1(10-4] 7. At a given temperature, the following system has an equilibrium constant, Ke, of 0.27. C(g) + B(g) === 2 E(g) The system was established by placing 8.00 moles of C and 5.0 moles of B in a 4.0 L vessel. Calculate the concentration of all substances at equilibrium.
B) the two atoms sharing electrons are equally electronegative. C) the two atoms sharing electrons are of the same element. D) it is between two atoms that are both very strong electron acceptors. E) the two atoms sharing electrons are different elements. 9) The ionic bond of sodium chloride is formed when A) chlorine gains an electron from sodium.