1 poAtomic weight 9, 3121 Atomicnumber 4 वाले atom का प�

1.	1 poAtomic weight 9, 3121 Atomicnumber 4 वाले atom का प्रतीक होगाO 4B9O 17 Cl 354Be 9
Answer» here, the atomic no is 4 and atomic weight is 9 so, the element is beryllium.hence, the symbol of beryllium is 'be'. 4Be9 is the right answer c is your correct answer because third element in periodic table left side of each option is atomic no and after the letter in the option mass no so answer is 4B9 ( c) 4 Be9 is the correct answer because atomic number of element is written downside and atomic weight is written up side option (d) is correctBeryllium has atomic no. 4 and mass no is 9

1 poAtomic weight 9, 3121 Atomicnumber 4 वाले atom का प्रतीक होगाO 4B9O 17 Cl 354Be 9

Answer»

here, the atomic no is 4 and atomic weight is 9 so, the element is beryllium.hence, the symbol of beryllium is 'be'.

4Be9 is the right answer

c is your correct answer because third element in periodic table

left side of each option is atomic no and after the letter in the option mass no so answer is 4B9

( c) 4 Be9 is the correct answer because atomic number of element is written downside and atomic weight is written up side

option (d) is correctBeryllium has atomic no. 4 and mass no is 9