subatomic particles ws 1 protons neutrons and electrons practice calculating the number of each

1. Boron (B): Atomic number is 5, so it has 5 protons. Since the number of protons equals the nu

Subatomic particles ws 1 protons neutrons and electrons...

Calculating the number of each particle in an atom: # Protons = Atomic Number # Electrons = Protons # Neutrons = Mass Number – Atomic Number Use the periodic table to find the numbers of protons, neutrons, and electrons for atoms of the following elements. Name of Element | Element Symbol | Mass Number | Atomic Number | Protons | Neutrons | Electrons -|-|-|-|-|-|- Boron | B | 11 | 5 | 5 | 6 | 5 Sodium | | 24 | 11 | | | | Y | 89 | 39 | | | Copper | | | 29 | | 35 | | Tc | 98 | 43 | | | | Pb | 207 | | | | Thallium | | 204 | 81 | | | | H | | 0 | | | Carbon | | 12 | | | | | N | | | 7 | | | | Ba | | | 56 | | | Calcium | | | | | | | Si | | | 14 | | | Argon | | | 18 | | | | Mg | | | 12 | | 12 |

Transcript

00:01 Hi now we will discuss about mass number atomic number number of protons number of electrons number of electrons number of electrons in the elements given 4on atomic symbol b mass number 11 atomic number 5 number of protons because atomic number is equal to number of protons and number of protons is equal to number of electrons as it is a neutral atom and number of neutrons is by mass number minus atomic number gives the number of neutrons so it is 6.

00:30 Accordingly we have to fill the for the other elements sodium atomic symbol is 20 n a 24 is the mass number 11 atomic number so number of protons 11 number of electrons 11 and number of neutrons 24 minus 11 which is 13 by atomic symbol is given it is for atrium 89 mass number and 39 electrons given as it is neutral atom 39 electrons is given so atomic number 39 and number of protons also 39 number of neutrons is 89 minus 39 so it is 50 copper atomic symbol and atomic number is given 29 number of neutrons given 35 so mass number is 29 plus 35 it is 64 atomic number 29 so number of protons 29 number of electrons 29 dc technetium 98 is the mass number number of protons 43 so atomic number 43 number of electrons 43 number of neutrons 93 minus 43 it is 55 then pb symbol is given it is lead element 2 .7 is the mass number and the atomic number of lead is 82 number of protons 82 number of electrons 82 number of neutrons 2 .07 minus 82 so it is 125 thalium element symbol t l 2 .4 is the mass number 81 is the atomic number so number of protons 81 number of electrons 21 and the number of neutrons 204 minus 81 so it is 123 h element symbol is given this is for hydrogen here zero neutrons are present when it will be zero neutrons when the mass number and atomic number is the same then it will become zero neutrons we know that the atomic number of hydrogen is one mass number is also one protons one number of electrons one carbon here mass number is given carbon atomic symbol is c atomic number 6 number of protons 6 number of neutrons 6 12 minus 6 is 6 number of electrons 6 n is given this is the symbol of nitrogen and 7 is the number of protons number of electrons 7 and atomic number 7 mass number 14 14 minus 7 is 7 that is the number of neutrons pa is given this is for barium 56 is given this is the number of electrons so atomic number is 56 number of protons 56 and mass number is 137 -137 minus 56 gives us the number of neutrons 81 neutrons calcium element symbol is pa mass number of calcium is 40 atomic number 20.

04:22 So number of protons 20 number of neutrons 20 that is 40 minus 20 is 20 number of electrons 20.

04:29 Si is the element simple for silicon.

04:35 14 electrons were there.

04:37 14 electrons means number of protons 14...

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