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.

Question

Quizplus · Accepted Answer

1) Transition metals show a decrease in atomic radii initially due to increased nuclear charge, then increase due to electron-electron repulsion in the d-orbitals. 2) The lanthanide contraction causes the 5th and 6th period d-block elements to have similar atomic radii. 3) The 6th period transition metals have higher densities due to their larger atomic masses and similar atomic sizes.

Which of the Following Statements Is/are CORRECT