Atoms of different elements have
A). Same atomic number and same electronic configuration
B). Different atomic number and same eletronic configu-ration
C). Different atomic number and different number of valence electrons
D). Same number of electrons and neutrons
Different atomic number and different number of valence electrons
The atoms of different elements have different numbers of electrons, protons, and neutrons. Every element is unique and has an atomic number. That number tells you the number of protons in every atom of the element. The atomic number is also called the proton number.
1. Threshold limit value of copper in the atmospheric air is
2. Which of the following is the strongest base in aqueous solution ?
3. Glass is a
4. What is the element required for solar energy conversion
5. The heaviest naturally occurring element is:
7. Aromatic hydrocarbons contain at least _____ benzene like ring in their molecules.
8. Sulphur dioxide present in the industrial chimney exhaust causes
9. Which of the following is ozone depleting pesticide ?
10. The most extensive, commercially useful source of thorium as monazite sand occurs in India at