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प्रश्न
Name the metals in the first twenty elements.
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उत्तर
Li, Be, Na, Mg, Al, K and Ca.
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संबंधित प्रश्न
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same period of the periodic table?
(b) What is the number of elements is 3rd period, the modern periodic table?
How many groups and periods does the modern periodic table have?
Give the chemical formula of sodium hydroxide
Answer the following question in one sentence.
The modern periodic table is divided into which blocks?
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
Explain the position of hydrogen in the periodic table.
Name the metalloids in the first twenty elements.
Name the non-metals in the first twenty elements.
