Which of the following is not a characteristic of most ionic compounds? a. they are solids b. they have low melting points c. when melted they conduct an electric current d. they are composed of metallic and non metallic elements what characteristic of metals makes them good electrical conductors? a. they have mobile valence electrons b. they have mobile protons c. they chase mobile cations d. their crystal structures can be rearranged easily. what are the weakest attractions between molecules? a. ionic forces b. van der waals forces c. covalent forces d. hydrogen forces which of the following correctly provides the name of the element, the symbol for the ion, and the name of the ion? a. fluorine f+, fluoride ion b. zine zn+, zincate ion c. copper cu+, cuprous ion d. sulfur, s+, sulfurous ion
General : The ionic compound is formed when a highly electropositive element loses its electron and another highly electronegative element accepts the electron.
Thus a positive ion and a negative ion is formed. They are attracted due to electrostatic attractions.
The ionic compounds are highly crystalline in nature and thus have high melting point.
1) Thus from the given statements the following is not a characteristic of ionic compound :they have low melting points
2) Metals are characterized by free electrons due to which they are conducting in nature. Thus answer is they have mobile valence electrons
3) The weakest interactions are van der waals forces. These are present even in noble gases
4) a) Fluorine , Symbol F- and name fluoride ion
b) Zinc forms
c) Copper , , cuprous ion : this is correct
d) Sulphur forms Sulphide ion
Which of the following is NOT a characteristic of most ionic compounds?
B.they have low melting points
What characteristic of metals makes them good electrical conductors?
A.they have mobile valence electrons
What are the weakest attractions between molecules?
B.van der waals forces
Which of the following correctly provides the name of the element, the symbol for the ion, and the name of the ion?
C.copper Cu+, cuprous ion
Option (a) is the correct answer.
When a non-metal gains an electron then it acquires a negative charge and when a metal loses an electron then it acquires a positive charge.
According to the IUPAC nomenclature, when a non-metal gains an electron then a suffix "-ide" is added at the end of the name of the ion. Whereas generally when a metal loses an electron then no suffix is added to its name but there are some exceptions.
For example, fluorine is a non-metal and when it gains one electron then it forms ion which is known as the fluoride ion. Similarly, sulfur on gaining two electrons form ion which is known as sulfide ion.
Copper on loosing one electron forms ion and it is known as cuprous ion or copper(I) and not Cu.
Thus, we can conclude that out of the given options fluorine, F, fluoride ion correctly provides the name of the element, the symbol for the ion, and the name of the ion.
Given the options:
A. Fluorine, F^+ , Fluoride ion
B. Zinc, Zn^2+ , Zincate ion
C. Copper, Cu^+ , Cuprous ion
D. Sulfur, S^2- , Sulfurous ion
Option A is not correct because fluoride ion is: F^-
Option B is not correct because Zn^2+ is called Zinc ion
Option C is correct
Option D is not correct because S^2- is called sulfur ion
That would be d).
Sulfur has an oxidation state of S2- if seen from the periodic table. It forms Sulfurous acid so, Sulfurous ion is the closest answer compared to all the other options you have!
Hope this helps
The answer is c)copper, Cu*, cuprous ion
Copper is the chemical element and one of the transition metals. Its main utility is due to its combination of its chemical, physical, electrical and abundance properties. Copper is obtained from chalcocite, covelite, etc. Copper is the first element of subgroup Ib of the periodic table. Its atom has the electronic structure 1s22s22p63s23p63d104s1. Its low ionization potential of the 4s1 electron results in an easy separation to get copper (I), or cuprous ion, Cu+,