1Experimental Chemistry Data Analysis 1. How do you know when to name something as an ionic compound? 2. How do you know when to name something as a molecular compound? 3. How does naming an ionic compound differ from naming a molecular compound? 4. How do you know when a polyatomic ion is present? Why do we include a Roman numeral in the name for compounds containing a transition metal and not for main group metals? 5. Solution 1. Ionic compounds contain ionic bond. When an electropositive metal (preferably groups 1 and 2) forms a compound with an electronegative element, it is an ionic compound. Eg- NaCl 2. Molecular bonds are formed by sharing of electrons. We can identify a compound as molecular compound if it has two or more non metal elements. 3. Naming of molecular compounds includes naming the first Atom as such and the second atom with a suffix of -ide. The number of atoms is also mentioned . Eg- carbon dioxide Ionic compound naming involves naming the first atom as such and attaching -ide with the name of second atom. Number of atoms is not mentioned. Eg- sodium chloride 4. If the ion has more than 1 atom, it is polyionic. We can see that by checking the number of non metal in the compound. If there is more than 1, it is polyatomic ion. Eg- carbonate ion has carbon and oxygen. 5. The Roman numeral represents the coordination number of the transition metal which is not applicable in case of main group metals as they don\'t form ligands. .

1. 1Experimental Chemistry Data Analysis 1. How do you know when to name something as an
ionic compound? 2. How do you know when to name something as a molecular compound? 3.
How does naming an ionic compound differ from naming a molecular compound? 4. How do
you know when a polyatomic ion is present? Why do we include a Roman numeral in the name
for compounds containing a transition metal and not for main group metals? 5.
Solution
1. Ionic compounds contain ionic bond. When an electropositive metal (preferably groups 1 and
2) forms a compound with an electronegative element, it is an ionic compound. Eg- NaCl
2. Molecular bonds are formed by sharing of electrons. We can identify a compound as
molecular compound if it has two or more non metal elements.
3. Naming of molecular compounds includes naming the first Atom as such and the second atom
with a suffix of -ide. The number of atoms is also mentioned . Eg- carbon dioxide
Ionic compound naming involves naming the first atom as such and attaching -ide with the name
of second atom. Number of atoms is not mentioned. Eg- sodium chloride
4. If the ion has more than 1 atom, it is polyionic. We can see that by checking the number of
non metal in the compound. If there is more than 1, it is polyatomic ion. Eg- carbonate ion has
carbon and oxygen.
5. The Roman numeral represents the coordination number of the transition metal which is not
applicable in case of main group metals as they don't form ligands.