Advertisements
Advertisements
प्रश्न
Name the metals in the first twenty elements.
Advertisements
उत्तर
Li, Be, Na, Mg, Al, K and Ca.
APPEARS IN
संबंधित प्रश्न
How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change.
Fill in the following blank with suitable word:
Group 17 elements are known as ...............
Give two example of group 17 elements.
Define:
Periodic table
The electronic configuration of an element T is 2, 8, 8, 1.
- What is the group number of T?
- What is the period number of T?
- How many valence electrons are there in an atom of T?
- What is the valency of T?
- Is it a metal or a non-metal?
Right or wrong sentence.
To the left of the zig-zag line in the periodic table are the metal elements.
In the modern periodic table, elements are arranged according to their ______
What is the symbol of the element Tungsten?
Compare the radii of two species X and Y. Give reasons for your answer.
- X has 12 protons and 12 electrons
- Y has 12 protons and 10 electrons
Answer the following in respect of element \[\ce{_16^32S}\].
To which group and period does it belong?
