NAME __________________________________ PERIOD _______________ DATE _____________ELEMENT CLASSIFICATION LABPURPOSE: In this activity you will investigate the properties of an element sample in order to classify it as a metal, non-metal, or semi-metal. You will write a claim for the classification of the element and provide evidence and reasoning/analysis to support your claim. ALL WORK, WITH THE EXCEPTION OF DATA COLLECTION, IS COMPLETELY INDIVIDUALLY

You will examine the physical properties of color, luster, malleability, and electrical conductivity. You will examine the chemical properties of each element by reacting it with hydrochloric acid (HCl) and cupper (II) chloride (CuCl2). Most metals react with hydrochloric acid to produce hydrogen gas. Most metals react with copper chloride to produce copper. The original element may change form, shape, or color during a chemical reaction.

Pre Lab Questions:

1. How will you know if a substance has reacted with acid or another chemical compound?

2. How will you know if a substance is able to conduct electricity?

Procedure1. Obtain 2 pieces of your assigned element and place in a separate area of the well plate. Record

the letter of your assigned element sample in the data table.2. Draw a colored picture of the element sample in the appropriate column next to the corresponding

letter.3. Observe and record the appearance of the element sample. Include physical properties such as

color, luster, as well as form.4. Read the results of crushing which is already provided for you in the results of crushing data

table.

RESULTS FROM CRUSHING-Record the results for your assigned element in the data table.Element Sample

A B C D E F G H

Results of Crushing

Crumbles into small pieces

Bends, flattens, does not crumble, stays in one piece

Crumbles into small pieces

Bends, flattens, does not crumble, stays in one piece

Crumbles into dust

Bends, flattens, does not crumble, stays in one piece

Breaks into smaller pieces but does not crumble

Crumbles into small pieces

5. Test conductivity by touching both electrodes to one element sample. DO NOT ALLOW THE

ELECTRODES TO TOUCH EACH OTHER. Use the conductivity meter chart and the light bulbs to determine if the element has high, medium, low, or no conductivity. Record the results in the data table.

6. Test for reactivity by adding 15-20 drops of hydrochloric acid (HCl) the well containing the first sample. Observe and record what happens in each well plate in the data table. If no reaction occurs, write no reaction in the data table.

7. Test for reactivity by adding 15-20 drops of cupper (II) chloride (CuCl2) to the well containing the second sample. Observe and record what happens in each well plate in the data table. If no reaction occurs, write no reaction in the data table.

8. Discard all materials by placing in the trash can and rinsing the well plate. NO SOLIDS IN THE SINK!

DATA TABLEELEMENT LETTER AND PICTURE

APPEARANCE DESCRIPTION

RESULT OF CRUSHING

CONDUCTIVITY REACTION WITH ACID

REACTION WITH COPPER (II) CHLORIDE

METAL/NON-METAL/SEMI-METAL

After completing the laboratory procedure and recording all of your data, write an extended paragraph addressing the following question:

Is your element sample, a metal, non-metal, or semi-metal?

Be sure to provide a claim, give and explain appropriate evidence, and make a concluding statement to your argument (see details below)

Claim

Write a statement that responds to the question.

Evidence

Choose at least four appropriate pieces of evidence from the data you collected

in this laboratory investigation Scientific data collected during the

investigation.

Reasoning/Explanation/ Analysis

In your OWN WORDS, what does the evidence state? Use knowledge that you have about the topic to explain why and how your evidence supports your claim.

In other words, explain how your evidence proves your point. Wrap up

your reasoning with a conclusion sentence that begins with a word such as "Therefore," "Hence," "Thus," "So,"

and re-state the claim.

Grading Rubric for claim paragraph:

3 2 1 0 States claim in the beginning of paragraph.

3 2 1 0 Supports claim with an explanation of relevant evidence (data).

3 2 1 0 Provides reasoning for claim through explanation and analysis of evidence.

3 2 1 0 Provides a concluding statement that follows from the argument presented.

3 Excellent 2 Sufficient 1 Approaching 0 Missing

Word process or write claim neatly on a separate piece of paper in paragraph form. Attach to this assignment.

Grading for Lab Portion:

Answers to prelab questions in complete sentences (2 points)

Completed Data Table. (2 points)

Accurate classification of unknown element (2 points)

Claim-Evidence-Reasoning (C-E-R)Student Graphic Organizer

Question:

(provided by teacher)

C(Claim)

Write a statement that responds to the question.

E(Evidence)

Provide data or research to support your claim.

Your evidence should be appropriate (relevant) and

sufficient (enough to convince someone that your claim is correct).

This can be bullet points instead of sentences.

R(Reasoning)

Use knowledge that you have about the topic to

explain why your evidence supports your

claim.

In other words, explain how your evidence proves

your point?

(paragraph format)

Claim-Evidence-Reasoning(C-E-R) Rubric

Debate Speaking #1

0 10 20 30

CLAIMA statement that answers the

original question/problem.

Does not make an accurate and complete

claim

Makes an accurate and complete claim. X X

EVIDENCEResearch that supports the claim

Needs to be appropriate and sufficient to support the claim.

Does not provide evidence, or only provides

inappropriate evidence (evidence that does not

support claim).

Provides appropriate but insufficient

evidence to support claim. May include some inappropriate

evidence.

Provides 1 to 3 pieces of

appropriate and sufficient pieces of

evidence to support the claim.

Provides 4 to 6 pieces of appropriate and sufficient pieces of

evidence to support the claim.

REASONINGExplain why your evidence supports

your claim. This should include knowledge that you have about the

topic and how your evidence supports your claim.

Demonstrates little knowledge, but does not

provide reasoning or provides

reasoning that does not clearly link claim to the

evidence

Demonstrates some knowledge and Provides a little

reasoning that links claim to the evidence

Demonstrates knowledge and Provides some reasoning that

links the claim to the evidence

Demonstrates Provides strong

reasoning that links claim to the evidence

Debate Speaking #2

Reflection

Need help writing your REASONING?Follow this path….

Sample C-E-R: AlienThe following are two samples of Claim-Evidence-Reasoning conclusions that were reviewed in class. The C-E-R examples are based on two commercials and one data table that we used to collect data. Feel free to come back and review these samples whenever you need a refresher on how to do a C-E-R.

Audi Commercial “Alien” http://www.youtube.com/watch?v=89uJz_us4PM

Question: Is the little girl’s dad an alien?

C(claim)

Write a statement that responds to the question.

Her dad is an alien.

E(evidence)

Provide scientific data to support your claim. You

should only use

Speaks a weird language Has a spaceship From a place with a weird name Drinks green stuff Looks funny

appropriate (relevant) data and include enough

data to convince someone that your claim

is correct. This can be bullet points instead of

sentences.

R(reasoning)

Explain why your evidence (data) supports your claim. In other words, how does

your data prove your point? Your explanation must include scientific

principles/knowledge that you have about the topic

to prove that your evidence supports your

claim.

The little girl’s dad is an alien. Aliens drink green stuff and they speak a weird language. They have spaceships to travel in. Aliens also look funny. They come from places that have weird names. They also walk funny.** The little girl’s dad drinks green stuff, he has a space ship of his own and he walks weird. He also looks weird, like an alien. Her dad speaks a weird language and finally, he is from a place with a weird name. Therefore, her dad is an alien.

**Note to students: This of course would be background knowledge that a little girl of her age would have (or assume she has) about aliens, for this example. C-E-Rs otherwise will be based on factual information.

Sample C-E-R: PromAudi Commercial “Prom” http://www.youtube.com/watch?v=ANhmS6QLd5Q

Question: Did the boy get punched in the face at prom?

C(claim)

Write a statement that responds to the question.

E(evidence)

Provide scientific data to support your claim. You

should only use appropriate (relevant)

data and include enough data to convince someone that your claim is correct. This can be bullet points

instead of sentences.

R(reasoning)

Explain why your evidence (data) supports your claim. In other words, how does

your data prove your point? Your explanation must include scientific

principles/knowledge that you have about the topic to

prove that your evidence supports your claim.

**Note to students: This of course is a silly sample we used in class to practice C-E-R writing and is based on a lot of speculation (what we think happened). C-E-Rs will otherwise will be based on factual information.

Sample C-E-R: Identifying Liquids

Question: Are any of the liquids in the data table the same substance?

C(claim)

Write a statement that responds to the question.

Liquid 1 and liquid 4 are the same substance.

E(evidence)

Have same melting point Have same density Both colorless

Provide scientific data to support your claim. You

should only use appropriate (relevant)

data and include enough data to convince

someone that your claim is correct. This can be

bullet points instead of sentences.

R(reasoning)

Explain why your evidence (data) supports your claim. In other words, how does

your data prove your point? Your explanation must include scientific

principles/knowledge that you have about the topic

to prove that your evidence supports your

claim.

Liquid 1 and liquid 4 are the same substance. In order for two liquids to be the same substances, they must have the same properties. Liquid 1 and liquid 4 both have the same densities, melting points and color. Therefore, liquid 1 and liquid 4 are the same substance.

Sample C-E-R: Identifying Liquids

Question: Are any of the liquids in the data table the same substance?

C

(claim)

Write a statement that responds to the question.

E

(evidence)

Provide scientific data to support your claim. You

should only use appropriate (relevant) data and include enough data to

convince someone that your claim is correct. This can be bullet points instead

of sentences.

R(reasoning)

Explain why your evidence (data) supports

your claim. In other words, how does your data

prove your point? Your explanation must include

scientific principles/knowledge that you have about the topic

to prove that your evidence supports your

claim.