Exams › JEE Main › Chemistry

Examine the statements below: (i) As we move from left to right across a period, atomic size generally decreases. (ii) As we go from top to bottom in a group, atomic size generally increases. (iii) Even though the periodic table is arranged according to atomic number, elements in the same vertical group show similar chemical behavior. Which of the statements given above are correct?

1. (i) and (ii)
2. (i) and (iii)
3. (ii) and (iii)
4. (i), (ii) and (iii)

Correct answer: (i) and (iii)

Solution

The first statement is correct because as you move across a period, increased nuclear charge pulls electrons closer to the nucleus, resulting in smaller atomic size. The third statement is also correct as elements in the same group have similar valence electron configurations, leading to similar chemical properties.

Related JEE Main Chemistry questions

• Which of the following sequences is incorrectly arranged with respect to the property mentioned alongside it?
• For the element having atomic number 120, which symbol and IUPAC systematic name are correctly paired?
• Which sequence correctly represents the ionization energies of carbon, nitrogen, and oxygen atoms?
• Identify the sequence that is not arranged correctly.
• Arrange the following species in order of decreasing radius: F$^-$, F, O, and O$^{2-}$.
• Identify the statement that is not correct:

⚔️ Practice JEE Main Chemistry free + battle 1v1 →