Question

why are alloys generally used to make everyday objects?
alloys are less expensive to produce than pure metals.
alloys are often stronger and less active than pure metals.
alloys have higher melting point than pure metals.
alloys have ionic bands instead of metallic bonds.

Explanation:

Alloys are mixtures of metals (or metals and non - metals). They are often stronger than pure metals because the different sized atoms in the alloy disrupt the regular lattice structure of the pure metal, making it harder for the layers of atoms to slide over each other. Also, some alloys are less active (more corrosion - resistant) than pure metals. For example, stainless steel (an alloy of iron, chromium, and nickel) is more corrosion - resistant than pure iron.

• The statement “Alloys are less expensive to produce than pure metals” is not always true. Some alloys, especially those with rare metals, can be very expensive.
• Alloys generally have a lower melting point than the pure metals they are made from (an exception is some intermetallic compounds, but in general alloy concept for everyday objects, this is the case). For example, solder (an alloy) has a lower melting point than the pure metals it is composed of.
• Alloys still have metallic bonds. The presence of different atoms in the alloy does not change the type of bonding from metallic to ionic.

Answer:

Alloys are often stronger and less active than pure metals.