An alpha element is one of the even- elements oxygen, neon, magnesium, silicon, sulfur and calcium, whose most abundant isotopes (, , , , , ) have mass numbers that are multiples of four, and which are made mainly in massive stars and returned to the gas by their explosion as core-collapse supernovae.
বইগুলো এখনো বাংলা ভাষায় পাওয়া যায় না — ইংরেজি সংস্করণ দেখানো হচ্ছে।
Earth and Space Sciences · পরিভাষা