Question

Consider the statements below and identify the correct answer.

1. Statement-I: Modern periodic table has 18 vertical columns known as groups.
2. Statement-II: Modern periodic table has 7 horizontal rows known as periods.

• A. None of these
• B. ii only
• C. i only
• D. All of these

Answer 1

Answer:

D. All of these

• Statement I is correct.

• The modern periodic table has 18 vertical columns called groups.

• Statement II is correct.

• The modern periodic table has 7 horizontal rows called periods