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romiroy12
romiroy12
@romiroy12
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Joined: Oct 18, 2020
Last seen: Jul 3, 2023
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Topics: 2049 / Replies: 0
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Topic
Out of Li and K, which have stronger metallic character and why?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 113
Topic
Explain why the number of elements in third period is 8?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 745
Topic
The atomic numbers of three elements X, Y and Z are 3, 11 and 17 respectively. State giving reason which two elements will show similar chemical properties.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 203
Topic
Write the atomic numbers of two elements ‘X' and ‘Y’ having electronic configurations 2, 8, 2 and 2, 8, 6 respectively.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 228
Topic
Out of the three elements P, Q and R having atomic numbers 11, 17 and 19 respectively, which two elements will show similar properties and why?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 312
Topic
Which has larger atomic radius Ca (20) or K (19).
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 435
Topic
List any two properties of the elements belonging to the first group of the modem periodic table.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 177
Topic
How does atomic size vary from left to right in a period?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 100
Topic
On moving from left to right in the second period when happens to the number of valence electrons?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 161
Topic
Why properties of elements are different belong to same period?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 392
Topic
Give reason why noble gases are placed in separate group in modem periodic table.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 96
Topic
State one reason for placing Mg and Ca in the same group of the periodic table.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 140
Topic
What do you mean by valency?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 80
Topic
Write the number of horizontal rows in the modem periodic table. What are these rows called?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 73
Topic
Write the number of vertical columns in the modem periodic table. What are these columns called?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 91
Topic
Write the formula used to determine the maximum number of electrons which a shell in an atom can accommodate.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 101
Topic
Could Modem Periodic Table solve all the problems?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 121
Topic
On what basis we can classify elements?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 76
Topic
Why is atomic number more important?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 89
Topic
Who invented atomic number?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 74
Page 17 / 103

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