Ermetova jamila ismailovna ermetov amirbek ismailovich karimova munisa maxsud qizi

lanthanide series –the series of rare-earth elements of atomic numbers 57 through 71 (lanthanum through lutetium).	lantanidlar qatori –atom soni 57 dan 71 gacha bo'lgan noyob-yer unsurlari seriyasi (lantiyum orqali lentan).
	law of conservation of mass – the principle that in any closed system subjected to no external forces, the mass is constant irrespective of its changes in form; the principle that matter cannot be created or destroyed.			massaning saqlanish qonuni – har qanday yopiq tizimda tashqi kuchlarga tobe bo'lmagan tamoyil, uning o'zgarishidan qat'i nazar, massa doimiyligini ta'minlaydi; moddani yaratish yoki yo'q qilish printsipi.