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प्रश्न
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with four shells
उत्तर
Atomic number 19
Electronic configuration (19): 2,8,8,1
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संबंधित प्रश्न
What are the atomic numbers of elements whose outermost electrons is represented by 3p5?
From the symbol `""_2^4"He"` for the element helium, write down the mass number and the atomic number of the element.
What are orbits or shells of an atom?
Draw the atomic diagram of the following element showing the distribution of – protons, neutrons and the electrons in the various shell of the atom.
Argon – \[\ce{^40_18Ar}\]
[The upper number represent the – mass number and the lower number represent the – atomic number e.g. calcium – mass number = 40, atomic number = 20]
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
Which sub-atomic particles in the 3 isotopes of ‘H’ are the same.
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Silicon [At. no. = 14, Mass no. = 28]
Differentiate mass number from atomic number.
What is common salt? Name the elements present in it. Write the formula of common salt. What are the atomic number and the mass number of the elements? Write the ions in the compound.
Which of the following are true for an element?
- Atomic number = number of protons + number of electrons
- Mass number = number of protons + number of neutrons
- Atomic mass = number of protons = number of neutrons
- Atomic number = number of protons = number of electrons
Give short answer:
what is the atomic mass number? mention its formula.
