Classify The Compound SiO2 As Ionic Or Covalent Covalent What Is The Name Of This Compound? Silicon Dioxide V 2. Classify The Compound Cu,Cro, As Ionic Or Covalent? Ionic What Is The Name Of This Compound? Copper Chromate Oxide 3. Classify The Compound Magnesium Phosphate As Ionic Or Covalent. Ionic What Is The Formula For This Compound? Mg(PO4)2
The Correct Answer and Explanation is :
Let’s go through the compounds and their classifications step by step, providing the explanations:
1. SiO2 (Silicon Dioxide):
- Classification: Covalent
- Explanation: Silicon dioxide (SiO2) is classified as a covalent compound because it is made up of nonmetals (silicon and oxygen). In covalent compounds, atoms share electrons to achieve a stable electron configuration. Silicon (Si) has four valence electrons, and oxygen (O) has six valence electrons. These atoms share electrons in a way that each oxygen atom forms two bonds with silicon, completing their valence shell. This sharing of electrons, rather than the transfer of electrons, makes SiO2 covalent. Additionally, silicon dioxide forms a strong network structure where each silicon is bonded to four oxygens, creating a three-dimensional lattice that is typical of covalent network solids.
- Name: Silicon Dioxide (SiO2)
2. CuCrO4 (Copper Chromate):
- Classification: Ionic
- Explanation: Copper chromate (CuCrO4) is an ionic compound. In ionic compounds, atoms transfer electrons from one to another, resulting in the formation of positively and negatively charged ions. In this case, copper (Cu) forms a positive ion (Cu^2+), and chromate (CrO4) forms a negatively charged ion (CrO4^2−). The electrostatic attraction between these oppositely charged ions holds the compound together. Copper chromate typically forms when copper ions bond with the chromate ion, which is a polyatomic ion composed of chromium and oxygen.
- Name: Copper Chromate (CuCrO4)
3. Magnesium Phosphate (Mg3(PO4)2):
- Classification: Ionic
- Explanation: Magnesium phosphate is an ionic compound because it consists of a metal (magnesium, Mg) and a polyatomic nonmetal ion (phosphate, PO4^3−). Magnesium (Mg) typically forms a 2+ ion (Mg^2+), while phosphate (PO4) is a polyatomic ion with a 3− charge. To balance the charges and form a neutral compound, three magnesium ions are needed for every two phosphate ions, giving the formula Mg3(PO4)2. The electrostatic attraction between the positively charged magnesium ions and the negatively charged phosphate ions results in the formation of this ionic compound.
- Formula: Magnesium Phosphate (Mg3(PO4)2)
Summary:
- SiO2 (Silicon Dioxide): Covalent, because it involves the sharing of electrons between nonmetals.
- CuCrO4 (Copper Chromate): Ionic, because it involves the transfer of electrons between a metal (copper) and a polyatomic nonmetal ion (chromate).
- Mg3(PO4)2 (Magnesium Phosphate): Ionic, because it involves the transfer of electrons between a metal (magnesium) and a polyatomic nonmetal ion (phosphate).