1. Distinguish between physical and chemical changes. Include examples in your explanations. 2. What are the differences among elements, compounds, and mixtures?
3. Fill in the chart below to identify the properties of shape and volume for each type of matter.
4. Explain how atomic mass and molecular mass are determined
5. Fill in the chart below to identify and describe the parts of an atom.

i think it is d. e because the next one is igneous.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

l dont know l am s sorry