Which of the Following Statements Is/are CORRECT

question 33

Multiple Choice

Which of the following statements is/are CORRECT?
1) The atomic radii of transition metals decrease initially,then increase as one moves from left to right across a period of the periodic table.
2) The atomic radii of the d-block elements in the 5^th and 6^th periods in each group are almost identical.
3) The densities of the 6^th period transition metals are greater than those of either the 4^th or 5^th period transition metals.

• A) 1 only
• B) 2 only
• C) 3 only
• D) 1 and 2
• E) 1,2,and 3

---

Definitions:

Left Atrium

One of the four chambers of the heart, receiving oxygen-rich blood from the lungs and pumping it into the left ventricle.

Right Atrium

The right atrium is a chamber in the heart that receives deoxygenated blood from the body through the vena cava and pumps it into the right ventricle.

Left Ventricle

The chamber of the heart that receives oxygenated blood from the left atrium and pumps it to the body through the aorta.

Repolarization

The process of restoring the resting negative charge inside cells, particularly in the context of nerve and muscle cells after depolarization.