تبلیغات
شیمی - عنصر هلیم Helium
یکشنبه 16 بهمن 1390

عنصر هلیم Helium

   نوشته شده توسط: رامتین اسحاق زاده    نوع مطلب :عناصر ،

هلیم (Helium) با علامت مختصر He یک عنصر شیمیایی بدون بو، بدون رنگ و بدون مزه‌است که به صورت گاز است. در جدول عناصر بعد از هیدروژن قرار می‌گیرد و دومین ماده‌ای است که به وفور در کیهان یافت می‌شود. هلیوم در سال ۱۸۶۸ توسط یک اخترشناس فرانسوی کشف شد. هلیوم در مواردی از جمله سرمازایی و پر کردن بالن‌ها استفاده می‌شود.

واژهٔ هلیوم از واژهٔ یونانی "هلیوس" (Helios) گرفته شده که بمعنای خورشید است


برچسب ها: هلیم ،

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