PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoAnswer the following questions:
Answer variants:
Properties of elements are a periodic function of their atomic number
\(7\) horizontal rows are called periods
P and R have the same properties because they have the various valance electrons
\(18\) horizontal rows are called groups
1. Write the number of horizontal rows in the modern periodic table. What are these rows called?
2. State the modern periodic law of classification of elements.
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