periodic table
/ˌpɪəriɒdɪk ˈteɪbl/noun
उच्चारण पिअरिऑडिक टेबल
आवर्त सारणी
Core word
noun
- 1
[sing.] the periodic table chemistry
a table of all the chemical elements, arranged in order of their atomic numbers so that elements with similar properties are in the same column
आवर्त सारणी
- Sodium and potassium are in the same group of the periodic table.
- Radhika learnt the first twenty elements of the periodic table in a single evening.
- The periodic table groups elements by their properties.
+ 3 more examples
- Mendeleev drew up an early version of the periodic table.
- Oxygen and sulphur are in the same column of the periodic table.
- We have a periodic table on the wall of our laboratory.
✓In the exam
General knowledge
Dmitri Mendeleev published his periodic table in 1869, arranging the elements by atomic mass.
GK: Dmitri Mendeleev ने 1869 में अपनी periodic table प्रकाशित की, जिसमें तत्वों को atomic mass के क्रम में रखा गया था।
The modern periodic table is based on atomic number and has 18 vertical groups and 7 horizontal periods.
GK: आधुनिक periodic table atomic number पर आधारित है और इसमें 18 खड़े groups और 7 आड़े periods हैं।