Which of the following Statements are NOT true about the periodic table?
A. The properties of elements are a function of atomic weights.
B. The properties of elements are a function of atomic numbers.
C. Elements having similar outer electronic configuration are arranged in the same period.
D. An element's location reflects the quantum numbers of the last filled orbital.
E. The number of elements in a period is the same as the number of atomic orbitals available in the energy level that is being filled.
Which of the following Statements are NOT true about the periodic table?
A. The properties of elements are a function of atomic weights.
B. The properties of elements are a function of atomic numbers.
C. Elements having similar outer electronic configuration are arranged in the same period.
D. An element's location reflects the quantum numbers of the last filled orbital.
E. The number of elements in a period is the same as the number of atomic orbitals available in the energy level that is being filled.
Show Hint
- A, C, and E Only
- D and E Only
- A and E Only
- B, C, and E Only
The Correct Option is A
Solution and Explanation
Analysis of Periodic Table Statements
Statement A: The properties of elements are a function of atomic weights. This statement is not true. The modern periodic table is organized based on atomic numbers, not atomic weights. This was a feature of the old periodic table by Mendeleev, where atomic weights were used. Therefore, Statement A is false.
Statement B: The properties of elements are a function of atomic numbers. This statement is true. The modern periodic table is arranged according to the atomic number (the number of protons) of elements. The properties of elements correlate with their atomic numbers, which determine their position in the table and chemical behavior. Therefore, Statement B is true.
Statement C: Elements having similar outer electronic configuration are arranged in the same period. This statement is not true. Elements with similar outer electronic configuration are arranged in the same group (column), not period (row). Elements in the same group have the same number of electrons in their outermost shell, resulting in similar chemical properties. Therefore, Statement C is false.
Statement D: An element's location reflects the quantum numbers of the last filled orbital. This statement is true. The location of an element in the periodic table corresponds to the quantum numbers of the last electron added to its electron configuration. This determines the element's group and period. Therefore, Statement D is true.
Statement E: The number of elements in a period is the same as the number of atomic orbitals available in the energy level that is being filled. This statement is not true. The number of elements in a period is based on the electron capacity of the subshells in that energy level. For example: - The first period has 2 elements (1s orbital), - The second and third periods have 8 elements (2s and 2p or 3s and 3p orbitals), - The fourth period has 18 elements (3d and 4s orbitals), and so on. Therefore, Statement E is false.
Conclusion:
The statements A, C, and E are not true.
Top Questions on Periodic Table
- Given below are two statements: Statement (I): According to the Law of Octaves, the elements were arranged in the increasing order of their atomic number.
Statement (II): Meyer observed a periodically repeated pattern upon plotting physical properties of certain elements against their respective atomic numbers. In the light of the above statements, choose the correct answer from the options given below:- JEE Main - 2025
- Chemistry
- Periodic Table
- Which of the following options represents the correct ionic radii in Å of N3-, O2-, and F- respectively?
- TS EAMCET - 2025
- Chemistry
- Periodic Table
- Radius of the first excited state of Helium ion is given as:
\(a_0\) = radius of first stationary state of hydrogen atom.- JEE Main - 2025
- Chemistry
- Periodic Table
Match List-I with List-II:
- JEE Main - 2025
- Chemistry
- Periodic Table
- Which of the following electronegativity order is incorrect?
- JEE Main - 2025
- Chemistry
- Periodic Table
Questions Asked in JEE Main exam
- If \( \alpha + i\beta \) and \( \gamma + i\delta \) are the roots of the equation \( x^2 - (3-2i)x - (2i-2) = 0 \), \( i = \sqrt{-1} \), then \( \alpha\gamma + \beta\delta \) is equal to:
- JEE Main - 2025
- complex numbers
- If for some \( \alpha, \beta \); \( \alpha \leq \beta \), \( \alpha + \beta = 8 \) and \[ \sec^2(\tan^{-1} \alpha) + \csc^2(\cot^{-1} \beta) = 36, \] then \( \alpha^2 + \beta \) is:
- JEE Main - 2025
- Quadratic Equations
Match List - I with List - II:
List - I:
(A) Electric field inside (distance \( r > 0 \) from center) of a uniformly charged spherical shell with surface charge density \( \sigma \), and radius \( R \).
(B) Electric field at distance \( r > 0 \) from a uniformly charged infinite plane sheet with surface charge density \( \sigma \).
(C) Electric field outside (distance \( r > 0 \) from center) of a uniformly charged spherical shell with surface charge density \( \sigma \), and radius \( R \).
(D) Electric field between two oppositely charged infinite plane parallel sheets with uniform surface charge density \( \sigma \).List - II:
(I) \( \frac{\sigma}{\epsilon_0} \)
(II) \( \frac{\sigma}{2\epsilon_0} \)
(III) 0
(IV) \( \frac{\sigma}{\epsilon_0 r^2} \) Choose the correct answer from the options given below:- JEE Main - 2025
- Electrostatics
Consider the following statements:
A. Surface tension arises due to extra energy of the molecules at the interior as compared to the molecules at the surface of a liquid.
B. As the temperature of liquid rises, the coefficient of viscosity increases.
C. As the temperature of gas increases, the coefficient of viscosity increases.
D. The onset of turbulence is determined by Reynolds number.
E. In a steady flow, two streamlines never intersect.
Choose the correct answer from the options given below:- JEE Main - 2025
- Fluid Mechanics
- A proton of mass 'mp' has same energy as that of a photon of wavelength 'λ'. If the proton is moving at non-relativistic speed, then ratio of its de Broglie wavelength to the wavelength of photon is.
- JEE Main - 2025
- Fluid Mechanics