Elements CER v2

You have been provided with the observations and measurements of two unknown element samples. Based on your knowledge of the periodic table, element properties, trends, and reactivity, you will identify both elements and explain your reasoning using a Claims-Evidence-Reasoning (CER) framework. After identifying the elements, you will compare each unknown element to another element or group of elements based on 2-3 common properties.

Imagine you are a chemist analyzing two unknown element samples. The following observations and measurements were made for each:

Using the Claims-Evidence-Reasoning (CER) format, write a paragraph for each element (2 paragraphs total) identifying which elements you believe the samples are, based on the given data. After identifying both elements, compare each unknown element to another element or group of elements based on 2-3 common properties (e.g., reactivity, state, electronegativity, metallic behavior). Your reasoning should focus on similarities and differences with respect to these properties.

For each element:

- Claim: Clearly state which element you think the unknown sample is.
- Evidence: Provide at least 3 specific pieces of evidence from the list of observations and measurements that support your claim.
- Reasoning/Comparison: Compare the unknown element to another element or group of elements (such as a family or period on the periodic table) based on 2-3 similar or different properties (such as reactivity, state, metallic behavior, or electronegativity). Explain how these comparisons further support your claim.