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?

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.

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: