Interactive - Unit 3. Lesson 3a. Naming and writing formulas for molecular compounds

Watch the video in the link above. Then chose the correct answer.1. The first rule to write the names of a molecular compounds is to count the number of atoms to identify the symbols of the elements in the formula to give the correct suffix to omit the suffix mono in the first element 2. The subscript in the formula indicate _ of that element. the number of ions the number of molecules the number of atoms the number of covalent bonds 3. The second rule in writing the names of molecular compounds is to identify the number of ions of each element the number of molecules the prefixes that you will use according to the number of atoms of that element the suffixes that you will use according to the suscript 4. The third rule in naming molecular compounds is to identify the number of atoms of each element identify the elements present in the formula assign prefixes according to the number of atoms of the element omit the prefix "mono" for the first element 5. Which of the names of the elements never take the prefix "mono"? The first The second 6. Which element in the compound's name always takes the suffix -ide? The first The second 7. According to what you saw in the video, what is the correct formula of antimony tribromide? Sb2Br3 Sb3Br3 Sb3Br SbBr3 8. Your turn. What is the correct formula for dinitrogen pentoxide? N5O2 N2O6 N2O5 NO2 9. What is the correct name forCl2O7? Chlorine heptoxide dichlorine heptoxide dichlorine heptaoxide dichlorine hexoxide 10. What is the correct formula for dinitrogen monoxide? N2O2 NO2 N2O ON2 II. Complete the following text about molecular compounds using words from the box. A binary molecular compound is a molecular compound that is composed of two elements. In general, the elements that combine to form binary molecular compounds are both nonmetals. This contrasts with ionic compounds, which involve bonds between metal cations and nonmetal anions. One difference between ionic and molecular compounds is that two nonmetal atoms will frequently combine with one another in a variety of ratios. Consider the elements nitrogen and oxygen. They combine to make several binary compounds, including NO, NO2, and N2O. Obviously they can't all be called nitrogen oxide! How would someone know which one you were talking about? Each of the three compounds has very different properties and reactivity. A system to distinguish between compounds such as these is necessary.