Question

1. An unknown element is found and it cracks in half when hit by a hammer. How would you classify this element?

2. An unknown element is a gas. Knowing what you know about the elements on the periodic table, this would most likely be what type of element?

3. An unknown element is brittle and conducts electricity. It is most likely what type of element?

4. How can you differentiate between the atomic # and mass?

Answer 1

An unknown element that cracks in half when hit by a hammer would be classified as a brittle element. A gas element would most likely be classified as a nonmetal. An element that is brittle and conducts electricity would likely be classified as a metalloid.

Step-by-step explanation:

An unknown element that cracks in half when hit by a hammer would be classified as a brittle element. Brittle substances are those that break or shatter easily when subjected to stress or impact. Unlike malleable materials, brittle materials do not deform or bend when force is applied to them.

An unknown element that is a gas would most likely be classified as a nonmetal. Nonmetals are typically gases or brittle solids. They are poor conductors of heat and electricity.

An unknown element that is brittle and conducts electricity would likely be classified as a metalloid. Metalloids are elements that have both metallic and nonmetallic properties. They are semi-conductors of electricity and can be brittle or malleable.

The atomic number of an element represents the number of protons in the nucleus of an atom, while the atomic mass represents the average mass of the atoms in a sample of that element. Atomic number is unique to each element and determines its place on the periodic table, while atomic mass can vary due to isotopes.

Answer 2

1. An unknown element is found and it cracks in half when hit by a hammer. How would you classify this element?

This element could be classified as a Metalloid or Non-metal.

2. An unknown element is a gas. Knowing what you know about the elements on the periodic table, this would most likely be what type of element?

The element is most likely a noble gas, as the majority of gasses in the periodic table are in this category.

3. An unknown element is brittle and conducts electricity. It is most likely what type of element?

Metalloids are brittle and somewhat conductive.

4. How can you differentiate between the atomic # and mass?

The atomic number is how many protons an element has, while the mass is the average number of between isotopes neutrons. The mass is always greater than the atomic number.