Chemistry Homework Help: Identifying Metals and Anomalous Density in Elements

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SUMMARY

The discussion focuses on identifying metals among a list of elements and analyzing density anomalies. The elements classified as metals include Silver, Lead, and Sodium. Sodium, while a metal, has a significantly lower density (0.97 g mL-1) compared to Silver (10.5 g mL-1) and Lead (11.3 g mL-1), which raises questions about its classification as an anomaly in density. Participants conclude that Sodium's lower density compared to other metals is indeed an anomaly due to its fewer protons and neutrons, affecting its mass per unit volume.

PREREQUISITES
  • Understanding of elemental classification (metals, non-metals, noble gases, halogens)
  • Basic knowledge of density and its calculation (mass per unit volume)
  • Familiarity with the periodic table and properties of elements
  • Concept of anomalies in scientific data
NEXT STEPS
  • Research the properties of alkali metals, focusing on Sodium's characteristics
  • Study the concept of density anomalies in chemistry
  • Learn about the periodic trends in density among metals and non-metals
  • Explore the classification of elements and their physical properties
USEFUL FOR

Chemistry students, educators, and anyone interested in understanding elemental properties and density anomalies in metals and non-metals.

Hybr!d
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Hey Guys. I got this question with these 6 elements in this table

Silver = Metal
Helium = Noble Gas
Hydrogen = Non Metal
Chlorine = Halogen
Lead = Metal
Sodium = Alkali Metal

Now the question says

Which of these are metals?

I answered: Silver, Lead

But I am wondering about Sodium can it be in the answer?

Also another question states:

Comparing the Density of the metals and non metals, Which element represents an anomaly? Why?

Density (g mL^-1)

Silver = 10.5
Helium = 0.00017
Hydrogen = 0.00008
Chlorine = 0.00291
Lead = 11.3
Sodium = 0.97

This question I don't clearly understand and I hope someone can help me!
 
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But I am wondering about Sodium can it be in the answer?
Sodium is a metal too.

Comparing the Density of the metals and non metals, Which element represents an anomaly? Why?

Density (g mL^-1)

Silver = 10.5
Helium = 0.00017
Hydrogen = 0.00008
Chlorine = 0.00291
Lead = 11.3
Sodium = 0.97

Metals:
Silver = 10.5
Lead = 11.3
Sodium = 0.97

Non metals:
Helium = 0.00017
Hydrogen = 0.00008
Chlorine = 0.00291

I don't see any anomality. Maybe they want you to answer sodium, but I don't see it as an anomality. It has a lower density than lead and silver because it has less protons and neutrons, which is the same to say mass, per unit of volume. I'm a beginner, I just tried to help. Wait for the experts.
 
Pponte Yeh I thought Sodium was a metal thanks for that but the last question is really bugging me.
 
PPonte said:
Metals:
Silver = 10.5
Lead = 11.3
Sodium = 0.97

Non metals:
Helium = 0.00017
Hydrogen = 0.00008
Chlorine = 0.00291

I don't see any anomality. Maybe they want you to answer sodium, but I don't see it as an anomality. It has a lower density than lead and silver because it has less protons and neutrons, which is the same to say mass, per unit of volume. I'm a beginner, I just tried to help. Wait for the experts.

Yes but because it has fewer electrons, protons and neutrons it must also have a smaller volume, which means that logically it's density shouldn't be that far off from the other metals but since it is, it is an anomaly.
 
Ahh thanks guys you are real champs..
 

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