تکنسیم
43
Tc
گروه
۷
تناوب
5
بلوک
d
پروتون ها
الکترون ها
نوترون ها
43
43
55
ویژگیهای عمومی
عدد اتمی
43
عدد جرمی
[۹۸]
عدد جرمی
98
دسته
فلزات واسطه
رنگ
نقره ای
رادیو اکتیو
بلی
From the Greek word technetos, artificial
ساختار کریستالی
شش ضلعی ساده
تاریخچه
Element 43 was predicted on the basis of the periodic table, and was erroneously reported as having been discovered in 1925, at which time it was named masurium.
The element was actually discovered by Carlo Perrier and Emilio Segrè in 1937.
It was also found in a sample of molybdenum sent by Ernest Lawrence that was bombarded by deuterons in the Berkeley cyclotron.
The element was actually discovered by Carlo Perrier and Emilio Segrè in 1937.
It was also found in a sample of molybdenum sent by Ernest Lawrence that was bombarded by deuterons in the Berkeley cyclotron.
الکترون های هر لایه
2, 8, 18, 13, 2
ساختار الکترونی
[Kr] 4d5 5s2
Technetium was the first element to be produced artificially
خواص فیزیکی
جنس
جامد
چگالی
۱۱٫۵ g/cm3
نقطه ذوب
۲۴۳۰٫۱۵ K ۲۱۵۷ | °C ۳۹۱۴٫۶ °F
نقطه جوش
۴۵۳۸٫۱۵ K ۴۲۶۵ | °C ۷۷۰۹ °F
گرمای همجوشی
۲۳ kJ/mol
گرمای تبخیر
۵۵۰ kJ/mol
ظرفیت گرمایی ویژه
-
فراوانی در پوسته زمین
قابل تغییر
فراوانی در جهان
قابل تغییر
شماره ثبت سی‌ای‌اس
7440-26-8
عدد CID پاب کم(PubChem)
قابل تغییر
خواص اتمی
شعاع اتمی
۱۳۶ pm
شعاع کووالانسی
۱۴۷ pm
الکترونگاتیویته
۱٫۹ (درجه پاولینگ)
پتانسیل یونیزاسیون
۷٫۲۸ eV
حجم اتمی
۸٫۵ cm3/mol
رسانایی گرما
۰٫۵۰۶ W/cm·K
حالات اکسید شدن
-3, -1, 1, 2, 3, 4, 5, 6, 7
کاربرد ها
Technetium is used in nuclear medicine to carry out a number of medical tests, mainly relating to imaging and functional studies of internal bodily organs like bone scan.
It is also used industrially for equipment calibration following its approval as a standard beta emitter.
Mild carbon steels may be effectively protected by minute quantities of technetium, but this corrosion protection is limited to closed systems because of technetium's radioactivity.
It is also used industrially for equipment calibration following its approval as a standard beta emitter.
Mild carbon steels may be effectively protected by minute quantities of technetium, but this corrosion protection is limited to closed systems because of technetium's radioactivity.
Technetium is harmful due to its radioactivity
ایزوتوپ ها
ایزوتوپ های پایدار
-ایزوتوپ های ناپایدار
85Tc, 86Tc, 87Tc, 88Tc, 89Tc, 90Tc, 91Tc, 92Tc, 93Tc, 94Tc, 95Tc, 96Tc, 97Tc, 98Tc, 99Tc, 100Tc, 101Tc, 102Tc, 103Tc, 104Tc, 105Tc, 106Tc, 107Tc, 108Tc, 109Tc, 110Tc, 111Tc, 112Tc, 113Tc, 114Tc, 115Tc, 116Tc, 117Tc, 118Tc