METALIC BOND & PROPERTIES IONIC AND COVALENT COMPOUND

1. Which substance contains metallic bond?

• Sodium chloride ,NaCl

• Iron nail, Fe

• Carbon dioxide, CO₂

• water, H₂O

How metallic bond is formed?

• Metal atoms donate its valence electron

• Non metal atoms share its valence electron

• Negatively charge sea of electron from strong electrostatic forces with positively charge metal ions

• Positively charge of ions formed strong electrostatic forces with negatively charge of non metal ions.

What is the effect the presence of metallic bond on the physical properties of a substance?

[ You can choose more than 1 answer]

• High melting and boiling point

• Solubility in water increase

• Good conductor of electricity

• High density

Why ionic compound cannot conduct electricity in solid state?

• The compound consist of neutral molecules only

• There are strong metallic bonds between the ions

• There are dative bonds between the ions

• The ions cannot move freely due to the presence of strong electrostatic forces

Which statements are correct?

• Ionic compound insoluble in organic compound

• Ionic compound soluble in water

• covalent compound insoluble in organic solvent

• covalent compound soluble in water

When ionic compound is being heated, the electrostatic forces between the ions will be overcome and the ions can move freely.

What is the effect of this situation?

• Ionic compound can conduct electricity in molten state

• Ionic compound cannot conduct electricity

• Ionic compound have high melting and boiling point

• Ionic compound soluble in water

Why covalent compound cannot conduct electricity in all states?

• The ions cannot move freely

• No presence of free moving ions, the compound only consist of neutral molecules

• There are strong electrostatic forces between the ions

• There are strong covalent bond bonds between the atoms

Sodium chloride consist of strong electrostatic forces between the ions. What is the effect to its physical properties?

• More soluble in water

• High density

• High melting and boiling point

• Low melting and boiling point

Why covalent compound have low melting and boiling points?

• The atoms are share electrons and formed covalent bond

• The ions are held by strong electrostatic forces

• The molecules are held by weak Van Der Waals forces

• There are the presence of hydrogen bonds

Identify which substance is a covalent compound

• NaCl

• Copper

• CO₂

• NH₄⁺