NEET Exam > NEET Videos > Chemistry Class 11 > Short Tricks: Periodic Table
Short Tricks: Periodic Table Video Lecture | Chemistry Class 11 - NEET
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FAQs on Short Tricks: Periodic Table Video Lecture - Chemistry Class 11 - NEET
| 1. What is the periodic table? |  |
Ans. The periodic table is a tabular arrangement of chemical elements, organized based on their atomic number, electron configuration, and recurring chemical properties. It provides a systematic way to understand the relationships between different elements and their properties.
| 2. How many elements are there in the periodic table? | |
Ans. Currently, there are 118 known elements in the periodic table. These elements range from hydrogen, which has the atomic number 1, to oganesson, which has the atomic number 118. However, new elements beyond oganesson may be discovered in the future.
| 3. What are periods and groups in the periodic table? | |
Ans. Periods in the periodic table represent the horizontal rows, numbered from 1 to 7. Each period signifies the energy level or shell in which the elements' outermost electrons are located.
On the other hand, groups (also known as families) represent the vertical columns in the periodic table, numbered from 1 to 18. Elements within the same group share similar chemical properties due to their similar electron configurations.
| 4. How are elements arranged in the periodic table? | |
Ans. Elements in the periodic table are arranged in order of increasing atomic number from left to right and top to bottom. This arrangement is based on the periodic law, which states that the properties of elements recur periodically when arranged by atomic number.
Elements in the same period have the same number of electron shells, while elements in the same group have the same number of valence electrons, resulting in similar chemical behavior.
| 5. What are some important properties of elements shown in the periodic table? | |
Ans. The periodic table provides information about various properties of elements, including their atomic number, atomic mass, symbol, electron configuration, and chemical reactivity. It also indicates trends in properties such as atomic size, ionization energy, electronegativity, and metallic character as you move across periods and down groups in the table. These trends help in understanding the behavior and characteristics of different elements.
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Dec 31, 2024 Last updated |
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