4D homework 30/3/10

Answer the following question in your homework jotter by copying the passage and inserting the missing words.

4ths Bonding Prep



Ionic bonds are normally found in compounds that contain a and a
.

When this type of bond is formed, electrons are from the metal atoms to the atoms, during the chemical reaction.

The elements that form such bonds, do so because they want to have an electron arrangement with a outer , like the noble gases.

Ionic substances consist of oppositely charged which are held together by strong electrostatic forces, in a structure known as an ionic . Ionic structures are normally at room temperature as the have very melting and boiling points.

They do / do not (delete as appropriate) conduct in the solid state because their
are not free to move. In water or in the molten state they do / do not (delete as appropriate) conduct. This is because

They generally do / do not (delete as appropriate) dissolve in water.

Write the formula for iron (II) oxide, and Magnesium Nitrate.

Covalent bonds occur between a atom and a . Covalent bonding involves the of electrons. Covalent structures can either be or a . They do / do not (delete as appropriate) conduct when molten or solid. They generally do / do not (delete as appropriate) dissolve in water.

Covalent molecular structures have melting points, and covalent structures have melting points.