Advertisements
Advertisements
प्रश्न
Name the particles which actually determine the mass of an atom.
Advertisements
उत्तर
The particles which actually determine the mass of an atom are neutrons and protons.
APPEARS IN
संबंधित प्रश्न
Explain the Atomic number with example.
Dalton said that ______ could not be divided.
What is variable valency? Name two elements having variable valency and state their valencies.
The atom of an element X has 7 electrons in its M shell.
What is the atomic number of element X?
Elements X, Y and Z have atomic numbers 6,9 and 12 respectively. Which one:
- Forms an anion
- Forms a cation
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
If an isotope of ‘H’ has mass no. = 2, how many electrons does it have.
From the symbol \[\ce{^4_2He}\] for the element helium, write down the mass number and the atomic number of the element.
The atomic number and the mass number of an element is 26 and 56 respectively. Calculate the number of electrons, protons and neutrons in its atom. Draw the structure.
Match the following:
| Column A | Column B | ||
| 1. | Mass of proton | a. | +1 |
| 2. | Mass of electron | b. | -1 |
| 3. | Charge of electron | c. | 9.31 x 10-28g |
| 4. | Charge of proton | d. | 1.67 x 10-24g |
Compare the charge and mass of protons and electrons.
