Materials and Properties Quiz

According to the text, carbon, nitrogen, phosphorus, oxygen, sulphur, most of the halogens, and the noble gases are classified as non-metals.

Some common properties of metals listed in the text are high melting and boiling points, metallic luster, malleability, ductility, conductivity of heat and electricity, high densities, and hardness.

The three categories of reactivity for metals mentioned in the text are very reactive, moderately reactive, and least reactive or noble.

<p>Some important physical characteristics of metals mentioned in the text are being mostly solids (except mercury), high melting and boiling points (except alkali metals), possessing metallic luster, malleability, ductility, conductivity of heat and electricity, high densities, and hardness (except sodium and potassium).</p> Signup and view all the answers

<p>Examples of very reactive metals listed in the text are potassium, sodium, calcium, magnesium, and aluminum.</p> Signup and view all the answers

<p>The text mentions three categories of reactivity for metals: a. Very reactive: potassium, sodium, calcium, magnesium and aluminium. b. Moderately reactive: zinc, iron, tin and lead. c. Least reactive or noble: copper, mercury, silver and gold. Each category contains examples of metals exhibiting the specified level of reactivity.</p> Signup and view all the answers

<p>The important physical characteristics of metals listed in the text include: i. Almost all metals are solids (except mercury) ii. They have high melting and boiling points, (except alkali metals) iii. They possess metallic luster and can be polished. iv. They are malleable (can be hammered into sheets), ductile (can be drawn into wires) and give off a tone when hit. v. They are good conductors of heat and electricity. vi. They have high densities. vii. They are hard (except sodium and potassium). Examples of these characteristics can be seen in metals such as iron, copper, and gold.</p> Signup and view all the answers

<p>Non-metals exist as gases, liquids, and soft or hard solids. Examples of non-metals in each form include: - Gases: nitrogen, oxygen - Liquids: bromine - Soft solids: sulfur - Hard solids: carbon (in the form of diamond or graphite)</p> Signup and view all the answers

<p>Metallic luster refers to the shine or gleam exhibited by metals. Examples of metals exhibiting metallic luster include copper, gold, and silver. When polished, these metals display a characteristic shine, which is a result of their metallic luster.</p> Signup and view all the answers

<p>Metals are known for their ability to conduct electricity. Examples of highly conductive metals mentioned in the text include copper, silver, and gold. These metals are widely used in electrical applications due to their excellent conductivity properties.</p> Signup and view all the answers