Advertisements
Advertisements
प्रश्न
Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
\[\ce{^39_19K}\]
Advertisements
उत्तर
Geometric atomic structure of:
\[\ce{^39_19K}\]
Number of protons P = 19 = e
A = P + n
39 = 19 + n
∴ n = 39 − 19 = 20
e = 19 (2, 8, 8, 1)
Electronic configuration
2, 8, 8, 1 electronic arrangement
APPEARS IN
संबंधित प्रश्न
In term of electron transfer, define Oxidation
Fill in the blanks.
The electrovalent bond or ionic bond is called as _____ bond
State the following is a reduction reaction or oxidation reaction.
\[\ce{Pb -> Pb^2+ + 2e-}\]
What is an α (alpha) particle?
State one observation which shows that atom is not indivisible.
Match the atomic numbers 4, 14, 8, 15 and 19 with each of the following:
- A solid non-metal of valency 3.
- A gas of valency 2.
- A metal of valency 1.
- A non-metal of valency 4.
Name the following:
Two atoms having the same number of protons and electrons but different number of neutrons.
\[\ce{^24_12Mg}\] and \[\ce{^26_12Mg}\] are symbols of isotopes of magnesium.
(a) Compare the atoms of these isotopes with respect to :
i. the composition of their nuclei
ii. their electronic configurations
(b) Give reasons why the two isotopes of magnesium have different mass numbers.
Copy and complete the following table relating to the atomic structure of some elements:
| Element | Atomic Number | Mass Number | Number of protons | Number of Neutrons | Number of Electrons |
| Beryllium | 4 | 9 | |||
| Fluorine | 9 | 10 | |||
| Sodium | 12 | 11 | |||
| Aluminium | 27 | 13 | |||
| Phosphorus | 31 | 15 |
How many electrons are required or released by each atom in chlorine to attain the nearest noble gas configuration?
