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Atomic number and mass number of 1 to 20 elements with symbol Atomic number is the number of proton elements in a nucleus Mass number = no of protons + no of neutrons Atomic number and mass number of first 20 elements are listed below: Atomic Number Symbol Element Name Mass Number 1 Hydrogen 1 2 Helium 4 3 Lithium 7 4 Beryllium 9 5 Boron 11 6 Carbon 12 7 Nitrogen 14 8 Oxygen 16 9 Fluorine 19 10 Neon
1 to 20 elements of periodic table with its atomic number mass and valency Potassium - Atomic number: 19, valency: +1 Calcium - Atomic number: 20, valency: +2 Learn more about atomic number and valency Valency, atomic number and symbol of first 30 elements in periodic table brainly in question 1164903 Define atomic number , mass number and valency brainly in question 6880409 Priya444 Hope this helps you :)
Calculate the formula unit mass of zno na2o k2co3 give atomic mass of . . . Formula unit mass is defined as the sum of the atomic masses of all atoms that are present in a formula unit of the given compound It is calculated by adding the atomic masses of all the atoms that are present in one formula unit
Explain why the relative atomic mass of cobalt is greater . . . - Brainly Answer: Because the most common form of Nickel is Ni-58 while the most common form of Cobalt is Co-59, this means that Cobalt (which is number 27 on the periodic table) has 27 protons and 32 neutrons Therefore 1 less proton but 2 more neutrons and hence has a greater mass than Nickel