Advertisements
Advertisements
प्रश्न
Dalton said that ______ could not be divided.
Advertisements
उत्तर
Dalton said that atoms could not be divided.
APPEARS IN
संबंधित प्रश्न
Explain the Mass number with example.
FILL IN THE BLANK
Rutherford won the Nobel Prize in 1908 for his investigations in the field of ......................
WRITE SHORT ANSWER
Define the atomic mass number of an atom.
The number of electrons in the atom of an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of an atom of this element ?
Give reason
Actual atomic mass is greater than mass number.
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element which can form trivalent ion
Draw the atomic diagram of the following element showing the distribution of – protons, neutrons and the electrons in the various shell of the atom.
Calcium – \[\ce{^40_20Ca}\]
[The upper number represent the – mass number and the lower number represent the – atomic number e.g. calcium – mass number = 40, atomic number = 20]
Elements X, Y, Z have atomic numbers 6, 9 and 12 respectively. Which one:
- forms anion – negative ion;
- forms cation – positive ion;
- has 4 electrons in the outermost orbit. [Y, Z, X]
K and L shells can accommodate a maximum of 2 and 8 electrons respectively.
In which one of the following, the number of protons is greater than the number of neutrons but number of protons is less than the number of electrons?
