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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
The metal which is hard and has high melting point and used in filaments of electrical bulbs is
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 361
Topic
Which of the following is a transition element?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 103
Topic
The atom of an element has electronic configuration 2, 8, 7. To which of the following elements would it be chemically similar?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 115
Topic
Which of the following set of elements is written in order of their increasing metallic character?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 131
Topic
Which one of the following statements is not correct about the trends in the properties of the elements of a group on going down in a group?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 398
Topic
An element ‘A’ belongs to the third period and group 16 of the Periodic Table. Find out the valency of A.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 168
Topic
Consider the following elements 20Ca, 8Or 18Ar, 16S, 4Be, 2He Which of the above elements would you expect to be in group 16 of the Periodic Table?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 153
Topic
An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the Periodic Table does it belong?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 173
Topic
An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting. Write the formula of the compound formed when X reacts with chlorine.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 115
Topic
Name the neutral atom in the Periodic Table which has the same number of electrons as K^+ and Cl^-.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 166
Topic
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 177
Topic
An element X from group 2 of the Periodic Table reacts with Y from group 17 to form a compound. Give the formula of the compound.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 154
Topic
The elements A, B and C belong to groups 1, 14 and 17 respectively of the Periodic Table. Which two elements will form ionic compounds?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 120
Topic
Which one of the following statements is not correct about the trends in the properties of the elements of a period on going from left to right?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 110
Topic
What is the atomic number of elements of period 3 and group 17 of the Periodic Table?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 158
Topic
Pick out the chemically most reactive elements from the given triads. Li, Na, K F, Cl, Br (a) Li and F (b) Li and Br (c) K and F (d) K and Br
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 2922
Topic
Carbon belongs to the second period and Group 14. Silicon belongs to the third period and Group 14. If atomic number of carbon is 6, the atomic number of silicon is
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 235
Topic
Which of these belong to the same period? Element A B C Atomic number 2 10 5
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 1041
Topic
Element ‘X’ forms a chloride with the formula XCl2, which is a solid with high melting point. X would most likely be in the same group of the periodic table as:
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 134
Topic
Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 164
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