Bissoy.com
Doctors Medicines MCQs Q&A

Consider the following statements regarding the Mendeleev periodic table. Identify the correct ones. Elements were arranged in increasing order of atomic weights in horizontal rows called 'groups' and vertical columns called ''periods'. Elements in the same group had the same 'valency' and similar chemical properties.

Consider the following statements regarding the Mendeleev periodic table. Identify the correct ones. Elements were arranged in increasing order of atomic weights in horizontal rows called 'groups' and vertical columns called ''periods'. Elements in the same group had the same 'valency' and similar chemical properties. Correct Answer Only II

The correct answer is Option(2) .i.e.Only II.   

  • At increasing order of atomic weights, the elements were arranged in horizontal rows called 'periods' and vertical columns called ''groups'.
  • Elements in a similar group had the same 'valency' and the same chemical properties. 
  • Mendeleev’s Periodic Table: 
    • Mendeleev introduced a table that consists of elements, called Mendeleev’s periodic table. 
    • In the increasing order of their atomic masses, he arranged the elements accordingly.
    • This arrangement posses Mendeleev to place elements in horizontal rows known as periods & vertical columns known as groups.
  • Periodic Law of Mendeleev: 
    • The chemical & physical properties of elements are periodic functions according to their atomic weights.  
    • The following table of Mendeleev shows the list of elements with respective atomic masses. 
Series Group I Group II Group III Group IV Group V Group VI Group VII Group VIII
1 H=1              
2 Li = 7 Be = 9.4 B = 11 C = 12 N = 14 O=16 F = 19  
3 Na=23 Mg=24 Al=27.3 Si=28 P=31 S=32 Cl = 35.5  

Related Questions

Which of the following statements is/are false regarding modern periodic table?
1. Elements in the modern periodic table are arranged in decreasing order of their atomic numbers.
2. Elements in the modern periodic table are arranged in increasing order of their atomic masses.
3. In the modern periodic table, isotopes are placed in adjacent groups.
4. Elements in modern periodic table are arranged in increasing order of their atomic numbers.
Which of the following statement(s) is/are false regarding the modern periodic table? i. In the modern periodic table, the elements are arranged in decreasing order of their atomic numbers. ii. In the modern periodic table, the elements are arranged in increasing order of their atomic masses. iii. In the modern periodic table, isotopes are placed in adjacent groups. iv. In the modern periodic table, the elements are arranged in increasing order of their atomic numbers.
Which of the following statement(s) is/are true? In the Modem Periodic Table, the arrangement of elements is based on their: Statement 1:increasing atomic number in the horizontal rows. Statement 2:increasing atomic number in the vertical columns.
When the elements are arranged in increasing order of atomic weights, the atomic weight of the middle element is approximately the average of the atomic weights of the other two elements' - this rule is known as-
Consider the following statements: I. There are 18 group and 8 periods in the periodic table. II. The valency of elements increases from 1 to 4 and then decreases to 0 on moving from left to right in a period. III. Atomic size, electropositive character, metallic character and basic nature of oxides decrease from left to right in a period. IV. In a period, electronegativity and electron affinity decreases from left to right. Which of these is/are correct?
In Mendeleev's periodic table, the vertical columns are called . . . . . . . . . and horizontal rows are called . . . . . . . .?
Which of the following statements are true regarding the trends in the modern periodic table? i. Atomic radius increases on going right in the periodic table. ii. Ionization energy increases as we go right in the periodic table. iii. Electron affinity increases as we go down in the group.
According to Mendeleev's periodic law, the elements were arranged in the periodic table in the order of-
Consider the following statements with reference to the periodic table of chemical elements.
1. Ionization potential gradually decreases along a period.
2. In a group of elements, electron affinity decreases as the atomic weight increases.
3. In a given period, electronegativity decreases as the atomic number increases.
Which of these statement(s) is/are correct?
In Mendeleev's periodic table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the periodic table later?