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प्रश्न
In the Modern Periodic Table – atoms of all elements are arranged according to their increasing order of – atomic numbers. An atom of nitrogen has seven protons and seven electrons. State what would be its atomic number.
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उत्तर
| Atomic number | Number of protons | Number of electrons |
| Z | p | e |
| Nitrogen atom has | 7 Protens | 7 electrons |
∴ Atomic number [Z] = no. of protons [p] = no. of electrons [e]
Z = 7 = 7
∴ Atomic number of nitrogen is 7.
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संबंधित प्रश्न
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From the standpoint of atomic structure, what determines which element will be the first and which the last in a period the periodic table?
The following diagram shows a part of the periodic table in which the elements are arranged according to their atomic numbers. (The letters given here not the chemical symbols of the elements):
| a 3 |
b 4 |
c 5 |
d 6 |
e 7 |
f 8 |
g 9 |
h 10 |
|
| i 11 |
j 12 |
k 13 |
l 14 |
m 15 |
n 16 |
o 17 |
p 18 |
(i) Which element has a bigger atom, a or f?
(ii) Which element has a higher valency, k or o?
(iii) Which element is more metallic i or k?
(iv) Which element is more non-metallic, d or g?
(v) Select a latter which represents a metal of valency 2.
(vi) Select a letter which represents a non-metal of valency 2.
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