Chemistry
Copy and complete the following table relating to the atomic structure of some elements :
| Element | Atomic No. | Mass No. | No. of Protons | No. of Neutrons | No. of Electrons |
|---|---|---|---|---|---|
| Beryllium | 4 | 9 | |||
| Fluorine | 9 | 10 | |||
| Sodium | 12 | 11 | |||
| Aluminium | 27 | 13 | |||
| Phosphorus | 31 | 15 |
Related Questions
What is the relation between the number of protons and the number of electrons in an atom.
What would be the reason for an element to have atoms with differing mass numbers.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of :
(i) aluminium
(ii) phosphorus
State the main postulates of Dalton's atomic theory. How does the modern atomic theory contradict and correlate with Dalton's atomic theory.