Fill in the following blanks : Atomic number Mass number Protons Neutrons Electrons Symbol 10 22 ............ ............ ............... ..............

Given that the atomic number is 10 and the mass number is 22 . We know that the atomic number is the total number of protons present in the atom. Hence, the number of protons present in the element is also 10 . We know that an atom is electrically neutral. So, the number of proton is also equal to the total number of electron. The number of proton is 10 . Hence, the number of the electron in the element is 10 . We know that, Mass number = Number of protons + Number of neutrons The number of neutrons = Mass number - Number of protons . Therefore , number of neutrons = 22 - 10 = 12 . The element with atomic number 10 is neon with the symbol Ne . The completely filled table is as shown: Atomic number Mass number Protons Neutrons Electrons Symbol 10 22 10 12 10 Ne

Fill in the following blanks in respect of an atom of an element : No. of protons No. of neutrons Mass number Atomic number No. of electrons symbol 11 12 ........... .............. .................. ...........

Given that the number of protons is 11 and neutrons is 12 . We know that the sum of the numbers of protons and neutrons in an atom is called the mass number. Mass number = Number of protons + Number of neutrons Mass number = 11 + 12 = 23 We know that the atomic number is the total number of protons present in the atom. The number of protons present in the element is 11 and hence, the atomic number of the element is 11 . We know that an atom is electrically neutral. So, the number of protons is also equal to the total numbers of electrons. The number of protons is 11 . Hence, the number of electrons in the element is 11 . The element with atomic number 11 is sodium with the symbol Na . The completely filled table is as shown: No. of protons. No. of neutrons. Mass number Atomic number No. of electrons. Symbol 11 12 23 11 11 Na