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ean 条码还用于在全球范围内为消费品贴标，在欧洲常以销售点扫描使用。 它们看起来与 UPC 代码非常相似，主要区别在于它们的地理应用。 虽然 EAN-13（包含 13 位数字）是默认外形尺寸，但您会在空间有限的产品（如小糖果）上找到 EAN-8（包含八位数字）条形码。
EAN is called as effective atomic number. It represents the total number of electrons surrounding the metal atom in a complex.It is composed of the electrons of metal and the corresponding ligands attached to that metal.It is calculated as:
'Effective atomic number' (EAN): It is the total number of electrons around the central metal ion present in a complex and calculated as the sum of the electrons on the metal ion and the number of electrons donated by the ligands. It can be calculated using the formula E A N = Z − X + Y Z = atomic number of the metal
In the given compound Atomic number of Manganese is 25 and as C O CO Carbon monoxide is a neutral ligand so oxidation state of Manganese is zero.Also, the no. of electrons donated by each CO ligand is 2.
EAN rule:- The total number of e − s linked with the central metal atom or ion in a complex plus the e − s donated by the ligand is known as Effective Atomic Number, i.e; E A N . It is the attainment of noble gas configuration.
What is the EAN (effective atomic number) of the underlined atom in the following complex? [F e – – – (H 2 O) 6] 2 +.
Calculate EAN of [F e (C O) 5]. View Solution. Q2. The E A N of iron in F e (C O) 5 and F e (C 5 H 5) 2 is ...
In F e (C O) 2 (N O) 2, Fe has 26 electron and it get 8 electron due to ligands and 2 electron due to negative valency so its EAN is 26 + 2 + 8 = 36. In C o 2 (C O) 8, Co has 27 electron and one electron due to covalent bond and 8 electron due to ligands so EAN = 27 + 1 + 8 = 36.
EAN rule is followed by K 4 [F e (C N) 6] complex. View Solution. Q5. The oxidation number of Fe in K 4 [F ...
24 maj 2021 · -常用条码：gtin upc ean gcid-gtin：14位，全球协会-gs1创建的，根据不同国家和地区的法规要求提供不同编码。一个ean可以生成10个gtin，主要用于沃尔玛-ean：13位，针对于欧洲，在亚马逊用的比较多-upc：12位，美国、北美、加拿大，在亚马逊用的多
