Table 1: The physical characteristics of six unknown samples.Sample B> 1700°C7InsolubleInsulatorPropertyMelting PointHardnessSolubility (H₂O)Electrical ConductivitySample A<-200°CN/ASolubleInsulatorSample C< 180°CN/AInsolubleInsulatorSample D> 600°C3InsolubleConductorSample E> 700°C9SolubleAqueous Conductor 21. Based on your understanding of the relationships between the structures and physical properties ofelements and compounds, which of the substances (Table 1) is most likely a metallic element? Why?Explain your reasoning in at least two (2) sentences.

Metals have high melting point. Generally metals are hard except Li, Na and K. Metals are soluble in…

21. Based on your understanding of the relationships between the structures and physical properties of elements and compounds, which of the substances (Table 1) is most likely a metallic element? Why? Explain your reasoning in at least two (2) sentences.

21. Based on your understanding of the relationships between the structures and physical properties of elements and compounds, which of the substances (Table 1) is most likely a metallic element? Why? Explain your reasoning in at least two (2) sentences.

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter7: Reactions In Aqueous Solutions

Section: Chapter Questions

Problem 12CR: What do we call reactions in which electrons are transferred between atoms or ions? What do we call...

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Question

Table 1: The physical characteristics of six unknown samples.
Sample B
> 1700°C
7
Insoluble
Insulator
Property
Melting Point
Hardness
Solubility (H₂O)
Electrical Conductivity
Sample A
<-200°C
N/A
Soluble
Insulator
Sample C
< 180°C
N/A
Insoluble
Insulator
Sample D
> 600°C
3
Insoluble
Conductor
Sample E
> 700°C
9
Soluble
Aqueous Conductor

21. Based on your understanding of the relationships between the structures and physical properties of
elements and compounds, which of the substances (Table 1) is most likely a metallic element? Why?
Explain your reasoning in at least two (2) sentences.

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PHOSPHOROUS...METAL OR NONMETAL? Phosphorous is highly reactive and never found as a free element on Earth. It can be found as white phosphorous and red phosphorus. White phosphorous is the more common form and, as the name suggests, is a white, waxy substance. White phosphorous emits a glow when exposed to oxygen, which is where the name Phosphorous come from. In Greek, phosphorous means "light bearer". Phosphorous is essential for life, where it is found in DNA, RNA, and ATP as well as the phospholipids which make up our cell membranes. Phosphorous is used by plants and thus fertilizer is used to replace phosphorous in the soil. Since phosphorous is so reactive it is even added to Napalm but more commonly you can find phosphorous in matches, where it is bonded to sulfur, which makes the head of a match much safer. White phosphorous melts at 44.1°C and boils at 280°C. It combines readily with chlorine and other halogens. Since it is so reactive it is stored under water in chemical…