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प्रश्न
Fill in the blank of the following statement :
All the mass of an atom is concentrated in a small region of space called the ___________.
उत्तर
All the mass of an atom is concentrated in a small region called the nucleus.
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संबंधित प्रश्न
In Milikan’s experiment, static electric charge on the oil drops has been obtained by shining X-rays. If the static electric charge on the oil drop is - 1.282 × 10-18C, calculate the number of electrons present on it.
Multiple Choice Questions
The sum of number of protons and number of neutrons present in the nucleus of an atom is called its
State the mass number, the atomic number, number of neutrons and electronic configuration of the following atoms.
`""^12""_6C, ""^16""_8O, ""^19""_9F, ""^20""_10Ne, ""_13""Al""^27, ""_17""Cl""^35`
Also, draw atomic diagrams for them.
The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What is its atomic number and mass number?
From the symbol `""_2^4"He"` for the element helium, write down the mass number and the atomic number of the element.
From the symbol \[\ce{^4_2He}\] for the element helium, write down the mass number and the atomic number of the element.
The particles that make up the atom are called ______ particles.
Name the 3 sub-atomic particles of an atom.
The Atomic number of an element is 20. It has ______ valence electrons.
State the term for the following:
The amount of substance which contains the same number of units as the number of atoms in carbon-12.
