Periodic Table and Periodic Laws

What is the basis of the modern periodic law?

Atomic weights

Nuclear charge

Atomic numbers (correct)

Electron configuration

What is the total number of periods in the periodic table?

6

8

5

7 (correct)

What represents the horizontal lines in the periodic table?

Periods (correct)

Groups

Families

Blocks

How many elements are present in each of the fourth and fifth periods?

18 Signup and view all the answers

What is the relationship between the nuclear charge of an atom and its atomic number?

They are directly proportional Signup and view all the answers

What is the number of groups in the periodic table according to the CAS system?

16 Signup and view all the answers

Which group of elements is composed of the elements Hydrogen, Lithium, Sodium, Potassium, Rubidium, Caesium, and Francium?

Alkali metals Signup and view all the answers

Which of the following elements are part of the VII A group?

Fluorine, Chlorine, Bromine, Iodine, Astatine Signup and view all the answers

Which of the following periods is the longest?

Sixth period Signup and view all the answers

Which of the following groups of elements are not included in the main periodic table?

Lanthanides and Actinides Signup and view all the answers

Which group of elements is characterized by being highly unreactive and having a full outer energy level?

Inert gases Signup and view all the answers

Which of the following elements are part of the III B group?

Scandium, Yttrium, Lanthanum, and Actinium Signup and view all the answers

What is the term given to the elements with atomic numbers 58 to 71?

Lanthanides Signup and view all the answers

How do you determine the period number of an element?

By writing the electronic configuration and checking the highest shell number Signup and view all the answers

What is the characteristic of the f-block elements in terms of their group number?

They are always in group -3 Signup and view all the answers

Which of the following statements is true about the lanthanides and actinides?

They are two separate groups of elements with different atomic number ranges Signup and view all the answers

How do you determine the group number of a d-block element?

By calculating the number of electrons in the ns and (n–1) d-subshell Signup and view all the answers

What is the characteristic of mercury among the d-block elements?

It is the only liquid d-block element at room temperature Signup and view all the answers