2 1 ionic covalent and metallic bond

The type of bonding that occurs between non-metal atoms is covalent bonding.

The type of bonding that occurs between metal atoms is metallic bonding.

The type of bonding that occurs between non-metal and metal atoms is ionic bonding.

Covalent bonding occurs in a water molecule.

Metallic bonding occurs in magnesium.

The three types of bonding are covalent, metallic and ionic.

Atoms bond to achieve a greater level of stability, which is reached when the atom obtains a full outer shell of electrons.

True. Ionic bonding takes place when metals and non-metals react by transferring electrons.

A dot and cross diagram shows the transfer of electrons between atoms to form ions in an ionic bond.

True. Ionic bonds involve the transfer of electrons between atoms.

In the formation of sodium chloride, the sodium atom loses an electron.

In the formation of magnesium oxide, the magnesium atom loses two electrons.

True. In dot and cross diagrams for exam purposes, you only need to show the outer electrons.

In the formation of an ionic compound, non-metal atoms gain electrons.

When an atom loses electrons, it formed a positively charged ion / cation.

False. When an atom gains electrons, it becomes a negatively charged anion.

When a Group 7 atom reacts with a Group 1 atom, the Group 7 atom: Gains one electron. Becomes negatively charged / becomes a 1- ion.

The Mg ion should have a 2+ charge outside the square bracket.

The formula for magnesium chloride is MgCl2.

False. Non-metal atoms gain electrons to become negatively charged ions.

False. The formula for sodium oxide is Na2O.

Ionic compounds are held together by strong electrostatic forces of attraction between oppositely charged ions.

True. Ionic compounds have high melting and boiling points due to the strong electrostatic forces holding the ions together.

The structure of ionic compounds is called a giant ionic lattice.

Ionic compounds are usually solid at room temperature.

Electrostatic forces are the attractive (or repulsive) forces between charged particles.

In an ionic lattice, electrostatic forces act in all directions.

False. Ionic compounds can conduct electricity when molten or aqueous.

In an ionic solution, the movement of ions allows electrical current to flow.

A giant ionic lattice is a series of positively charged and negatively charged ions arranged in an alternating pattern.

The 3D ball and stick model inaccurately represents ionic bonds as sticks between ions, whereas in reality an ionic bond is an electrostatic force of attraction that acts in all directions around an ion.

True. The 3D space-filling model is more accurate than the 3D ball and stick model for representing ionic compounds.

A short straight line between two atoms represents a covalent bond.

A covalent bond is a type of chemical bond where atoms share pairs of electrons with each other.

False. Covalent bonds involve sharing electrons, not transferring them.

The materials that form covalent bonds are non-metals.

Sharing electrons in the covalent bond allows each atom to achieve an electron configuration similar to a noble gas.

A compound / molecule is formed when a group of two or more atoms covalently bond together.

The smallest molecule is hydrogen, H2.

In a dot and cross diagram, dots and crosses represents electrons.

The dot and cross diagram for hydrogen, H2, is:

The dot and cross diagram for hydrogen chloride, HCl, is:

The dot and cross diagram for water, H2O, is:

False. Not all covalent molecules are small; covalent molecules can also be very large, such as polymers and giant covalent structures.

Simple covalent molecules are small and can be separated into individual molecular units without breaking chemical bonds, while giant covalent structures form huge continuous networks of atoms that cannot be separated without breaking bonds.

One advantage of using the a dot and cross diagram is:

One disadvantage of using the a dot and cross diagram is:

One advantage of the ball and stick model to represent a molecule of ammonia is:

One disadvantage of the ball and stick model to represent a molecule of ammonia is:

One advantage of the 2D representation of a molecule of methane is:

One disadvantage of the 2D representation of a molecule of methane is:

False. The atoms in the polymer molecules are linked to other atoms by strong covalent bonds.

Metallic bonding is the strong electrostatic force of attraction between delocalised electrons and positively charged metal ions.

Delocalised electrons are electrons in metals that do not belong to any particular metal atom and are free to move throughout the metal lattice.

Metal structures are positive metal ions arranged in a regular pattern, with a "sea" of delocalised electrons moving freely between them.

False. Metallic bonds are strong due to the attraction between positive metal ions and delocalised electrons.

True. Electrons in the outer shell of metal atoms are lost in metallic bonding.

Delocalised electrons are electrons that no longer belong to any specific metal atom.

Metals have a giant lattice structure.