Why are melting and boiling points of alkali metals low?

Q: Why does sodium fluoride have a melting point of 993°C but nitrogen has a melting point of -210°C?

A: Please find your solution below : Melting point of any substance is defined as the temperature at…

Q: What correlation, if any, exists for the Period 2 elements between group number and the number of…

A: The number of electrons in an element is equal to its atomic number. In order to become stable an…

Q: Why is Iron (II) oxide not similar to copper (I)oxide

A: Iron (II) oxide contains iron (II) ion and oxide ion. copper (I) oxide contains copper (I) ion and…

Q: Consider these statements about an element E in Group 4A: • The most important modern use of E is as…

A: Group 4A, also known as Group 14, is a group of elements in the periodic table. It includes the…

Q: Explain why the Hydrated salts of beryllium are acidic whereas hydrated salts of magnesium are…

A: But the hydrated beryllium ions (called tetraaquaberyllium ions) are quite strongly acidic. The…

Q: Which of the following compounds would you expect to have the lowest melting point? CaO H2O Na2O…

A: Ionic compounds with higher charges have higher melting point due to strong intermolecular forces…

Q: Why alkali metals donot exist as free in nature?

A: Alkali metals are s-block elements or 1A group elements.  These metals have only one electron in the…

Q: What is a tetrahedral hole?

A:

Q: The following equation correctly represents the formation of an oxide anion: O(g) 0² (g) + 2e → O…

A: In an atom three fundamental particles are present. Positively charged particle protons and neutral…

Q: Write a balanced equation for the reaction of iron(III) oxide(s) and aluminum(s) to give aluminum…

A: A reaction is said to be balanced if all the atoms or elements present in the atoms in reactant is…

Q: Explain the fact that hydrated salts of beryllium are acidic whereas hydrated salts of magnesium are…

A: Answer: Beryllium is a smaller cation than magnesium, with a higher charge density due to its…

Q: Briefly describe how malleability and ductility of metalsare explained by metallic bonding.

A: Metallic bond =  It is a type of bond formed between positively charged atoms. In these bonds,…

Q: Which element has the following general properties: solid at room temperature, high luster,…

A: A solid-state is the state that has neither change in shape nor change in volume that means both are…

Q: Look up tellurium 1Z = 522 in the periodic table and predict how many covalent bonds it is likely to…

A: Covalent compounds are formed by sharing of electrons in between two or more atoms. In the covalent…

Q: Which element is brittle and does not conduct heat or electricity?

A:

Q: Which of the following has the largest covalent radius ?   Mg Ca Sr Ba

A: Covalent radius of an element is defined as the half of the internuclear distance between two atom…

Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.