The D And F Block

Question 1

What are the two main categories of d block elements?

Answer 1

Transition metals and inner transition metals.

Question 2

True or False: The d block elements are also known as the transition metals.

Answer 2

True.

Question 3

Fill in the blank: The d block elements are found in groups ___ to ___ of the periodic table.

Answer 3

3 to 12.

Question 4

What is the typical oxidation state of most transition metals?

Answer 4

They often exhibit multiple oxidation states.

Question 5

Which block of the periodic table contains the lanthanides and actinides?

Answer 5

The f block.

Question 6

What is the electron configuration pattern for transition metals?

Answer 6

The electron configuration generally follows the pattern (n-1)d^1-10 ns^0-2.

Question 7

True or False: The f block elements are all radioactive.

Answer 7

False.

Question 8

What is a common property of transition metals?

Answer 8

They are good conductors of electricity.

Question 9

Which element is the first in the lanthanide series?

Answer 9

Lanthanum (La).

Question 10

What is the primary characteristic of transition metals that distinguishes them from s block metals?

Answer 10

They have partially filled d orbitals.

Question 11

What type of compounds do transition metals often form?

Answer 11

Coordination compounds.

Question 12

Fill in the blank: The actinide series starts with the element ___.

Answer 12

Actinium (Ac).

Question 13

Multiple Choice: Which of the following is a property of f block elements? A) High melting points B) Low density C) Radioactivity D) All of the above

Answer 13

D) All of the above.

Question 14

What role do transition metals play in biological systems?

Answer 14

They often act as catalysts or are part of enzyme structures.

Question 15

True or False: All d block elements can form colored compounds.

Answer 15

False.

Question 16

What is the significance of the variable oxidation states in transition metals?

Answer 16

They allow for a wide variety of chemical reactions and compounds.

Question 17

Which transition metal is known for its high corrosion resistance?

Answer 17

Platinum (Pt).

Question 18

Fill in the blank: The common oxidation states of iron (Fe) are ___ and ___.

Answer 18

2 and 3.

Question 19

What is the main use of the element Uranium (U)?

Answer 19

Nuclear fuel.

Question 20

What is the characteristic of f block elements regarding their placement in the periodic table?

Answer 20

They are placed below the main body of the periodic table.

Question 21

Multiple Choice: Which of the following is a transition metal? A) Sodium B) Iron C) Calcium D) Helium

Answer 21

B) Iron.

Question 22

How many elements are there in the lanthanide series?

Answer 22

15 elements.

Question 23

What is one common application of transition metal complexes?

Answer 23

They are used in catalysts for chemical reactions.

Question 24

True or False: The f block elements have completely filled f orbitals.

Answer 24

False.

Question 25

What is the primary feature of the electron configuration of f block elements?

Answer 25

They involve the filling of the 4f and 5f orbitals.

Question 26

What is the last element in the actinide series?

Answer 26

Lawrencium (Lr).

Question 27

What are transition elements?

Answer 27

Elements that have incompletely filled d-orbitals in their common oxidation states.

Question 28

Which metals are considered precious transition metals?

Answer 28

Silver, gold, and platinum.

Question 29

Name some industrially important transition metals.

Answer 29

Iron, titanium, and copper.

Question 30

What series of transition metals are discussed in the unit?

Answer 30

The first row (3d), second row (4d), third row (5d), and fourth row (6d) transition metals.

Question 31

What is the general electronic configuration for transition elements?

Answer 31

(n-1)d^x ns^y, where x can range from 1 to 10 and y can be 1 or 2.

Question 32

True or False: All transition metals have the same number of oxidation states.

Answer 32

False.

Question 33

Fill in the blank: The d-block occupies the _______ section of the periodic table.

Answer 33

middle

Question 34

What characterizes the d-orbitals of transition elements?

Answer 34

They are influenced by their surroundings and can exhibit magnetic and electrochemical properties.

Question 35

What is a consequence of having half and completely filled sets of orbitals?

Answer 35

They are relatively more stable.

Question 36

Explain the electronic configuration of Chromium (Cr).

Answer 36

It has a configuration of 3d^5 4s^1 instead of 3d^4 4s^2.

Question 37

What distinguishes Scandium (Z=21) as a transition element but not Zinc (Z=30)?

Answer 37

Scandium has incompletely filled 3d orbitals, while Zinc has completely filled d orbitals.

Question 38

List the first series of transition elements mentioned.

Answer 38

* Scandium (Sc) * Titanium (Ti) * Vanadium (V) * Chromium (Cr) * Manganese (Mn) * Iron (Fe) * Cobalt (Co) * Nickel (Ni) * Copper (Cu) * Zinc (Zn)

Question 39

What is the significance of the energy difference between the (n-1)d and ns orbitals?

Answer 39

It influences electron configuration and stability.

Question 40

What is the oxidation state of Zinc in its ground state?

Answer 40

It is not considered a transition element because it has a fully filled d orbital.

Question 41

True or False: The transition metals are flanked between the s- and p-blocks in the periodic table.

Answer 41

True.

Question 42

What type of properties do transition metals exhibit?

Answer 42

They exhibit a variety of oxidation states and can form complex compounds.

Question 43

What is the role of d-orbitals in chemical reactivity of transition elements?

Answer 43

They contribute to the formation of bonds and influence magnetic properties.