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प्रश्न
Name the metals in the first twenty elements.
उत्तर
Li, Be, Na, Mg, Al, K and Ca.
संबंधित प्रश्न
Fill in the following blank with suitable word:
Group 18 elements are called ...............
On which side of the periodic table will you find metals?
Correct the statement.
Transition elements are placed at extreme right of the periodic table.
How does the electronic configuration of an atom relate to its position in the modern periodic table?
What is the main characteristic of the last element in each period of the periodic table?
How will the tendency to gain electrons change as we go from left to right across a period? Why?
Give the symbol and valency of the following element and radical.
Sulphite
Write scientific reason.
There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.
Which of the following is the outermost shell for elements of period 2?
An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants.
- Identify the element X
- Write the electronic configuration of X
- Write the balanced chemical equation for the thermal decomposition of ferrous sulphate crystals?
- What would be the nature (acidic/ basic) of oxides formed?
- Locate the position of the element in the Modern Periodic Table.
