Advertisements
Advertisements
प्रश्न
Name the non-metals in the first twenty elements.
Advertisements
उत्तर
C, N, O, F, Ne, P, S, Cl, Ar, H and He.
APPEARS IN
संबंधित प्रश्न
Fill in the blank:
The modern periodic table consists of ……………. periods.
How does the metallic character of elements in Modern Periodic Table vary on moving from left to right in a period, and (ii) down a group?Give reason to justify your answer.
Explain why All the elements of a group have similar chemical properties.
What is a period in a periodic table?
Write a short note.
Structure of the modern periodic table.
Compare Modern Periodic Law with Mendeleev's Periodic Law.
An X element with atomic number 11 and Y element with atomic number 13 belongs to the third period in the modern periodic table. With this information, give the answers of the below questions.
- Which element has more metallic character from these two elements?
- What is the valency of each X and Y elements?
- Atom size of Y element is smaller than atom size of X element? Explain?
State any five features of modern periodic table.
How does the property vary in periods and in groups?
What is the symbol of the element Tungsten?
