Tl

Thallium

উপাদান 81 · 204.38 u

Post-Transition Metal p-ব্লক Period 6 দল 13 Solid at RT Wikipedia →

Thallium is a highly toxic post-transition metal once used as rat poison.

Physical Properties

পদাৰ্থ204.38 u
ঘনত্ব11.85 g/cm³
Melting Point577.0 K
উত্তাপৰ বিন্দু1746.0 K
আকৃতিSilvery-white metallic
State at Room TempSolid

রাসায়নিক বৈশিষ্ট্যসমূহ

ইলেকট্ৰোনেজেটিভিটি1.62 (Pauling)
1- তম আইনাইজেশন শক্তি589.4 kJ/mol
ইলেকট্ৰন19.2 kJ/mol
Oxidation States+1, +3

প্ৰমাণপত্ৰৰ বৈশিষ্ট্য

ইলেকট্ৰন[Xe] 4f14 5d10 6s2 6p1
পৰমাণু170.0 pm
কোভালেন্ট বেৰিয়াড145.0 pm
Van der Waals Radius196.0 pm

ডিস্কভাৰী

আবিষ্কাৰ কৰা হৈছেWilliam Crookes
আবিষ্কাৰৰ বছৰ1861
অৱস্থানLondon, England
Named AfterGreek 'thallos' meaning green shoot, from its bright green spectral line

বিষয়ে Thallium

Thallium is a soft, silvery-white metal that is extremely toxic. It was historically used as a murder weapon due to its tastelessness and was banned as rat poison in many countries.

Uses & Applications

Semiconductor devices, infrared optics, medical imaging, and specialized glass.

মজা কথা

Thallium was the 'poisoner's poison' -- tasteless, odorless, and its symptoms mimicked common illnesses.

আইসোটোপ

Mass Number অভাৱ হাফ-লাইফ Stable
203 0.2952% - Yes
205 0.7048% - Yes

ইলেকট্ৰন

[Xe] 4f14 5d10 6s2 6p1

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