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प्रश्न
Dalton said that ______ could not be divided.
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उत्तर
Dalton said that atoms could not be divided.
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संबंधित प्रश्न
Explain the Mass number with example.
What are the atomic numbers of elements whose outermost electrons is represented by 3s1.
Multiple Choice Questions
If the atomic number of an atom is 17 and mass number is 35 then number of neutron will be
Fill in the blank of the following statement :
The total number of protons and neutrons in the nucleus of an atom is called its _________.
The mass number of an element is 23 and it contains 11 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?
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]
From the symbol \[\ce{^4_2He}\] for the element helium, write down the mass number and the atomic number of the element.
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
What is a neutron?
‘Z’ is denoted by ______.
