Periodic Table: 105 Common Questions Answered for the year 2024

Periodic Table: 105 Common Questions Answered for the year 2024
Share this

Introduction to the Periodic Table: The Building Blocks of Matter

The Periodic Table of Elements is more than just a scientific icon; it's a vast grid that holds the secrets of the universe! An understanding of the Periodic Table allows us to comprehend the building blocks of the world around us, from the air we breathe to the core of distant stars.

What is the periodic table?

The periodic table is a tabular arrangement of chemical elements, organized based on their atomic number, electron configuration, and recurring chemical properties. Elements are listed in order of increasing atomic number, which corresponds to the number of protons in an atom's atomic nucleus.

The table has rows called periods and columns called groups. The groups contain elements with similar properties, due to the similar outer shell electron configuration.

The periodic table is divided into several blocks:

  1. S-Block: This includes Group 1 (alkali metals) and Group 2 (alkaline earth metals) plus hydrogen and helium.

  2. P-Block: This includes Groups 13 to 18, containing a wide range of metallic, semi-metallic, and non-metallic elements.

  3. D-Block: This includes transition metals, which are Groups 3 to 12.

  4. F-Block: This includes the Lanthanides and the Actinides series. These elements are often listed separately at the bottom of the Periodic Table to keep the table compact.

 the periodic table consists of 118 confirmed elements, from element 1 (hydrogen) to element 118 (oganesson). Some of these elements are naturally occurring, while others have only been created synthetically in laboratories.

The periodic table is a fundamental tool in chemistry, allowing scientists to understand the relationships between various elements, predict the properties of new, yet-to-be-discovered or synthesized elements, and interpret or predict how different elements will react with each other.

periodic table period and group

In the periodic table, a period refers to a horizontal row, while a group refers to a vertical column.

Periods: The periodic table consists of seven periods, numbered from 1 to 7. As you move from left to right across a period, each element has one more proton and electron than the previous element. This increment changes the properties of the elements. Also, as you move from left to right, the elements become less metallic. The first element of a period is always an extremely active metal (like sodium or potassium), while the last element of a period is always an inactive noble gas (like neon or argon).

Periodic table group

Groups: The periodic table consists of 18 groups, numbered from 1 to 18 (in some versions, the groups in the middle are labeled with Roman numerals and the letters A and B). Elements in the same group have similar chemical and physical properties. This is because they have the same number of valence electrons, which are the electrons in the outermost shell of an atom that determine its chemical reactivity. For example, all elements in Group 1 (also known as alkali metals) have one valence electron and are highly reactive, while elements in Group 18 (also known as noble gases) have a full set of valence electrons and are very stable and unreactive.

The transition metals, which are the elements in the middle of the table, are often considered as a separate series rather than belonging to groups 3-12 because they have similar properties to each other, but not to the rest of the groups.

In addition to these, the elements can be divided into blocks (s, p, d, f) based on their electron configuration. Each block includes elements from certain groups: s-block includes groups 1 and 2, p-block includes groups 13-18, d-block consists of transition metals (groups 3-12), and f-block includes the inner transition metals (lanthanides and actinides).

List of Periodic Table Elements in the year 2024

All 118 elements of the Modern Periodic Tabe are listed below.


Click here to download periodic table high resolution image

Click here to download Periodic table flashcards

105 Periodic table questions and their answers asked by students

*Note some of the questions may have the same meaning and answers

  1. Who discovered the modern periodic table?

    The modern periodic table was largely developed by Dmitri Mendeleev, a Russian chemist, in 1869. Mendeleev's table organized elements by atomic weight, and he even left blank spaces in his table where he predicted unknown elements would fit, many of which were discovered later.


  2. Who arranged the periodic table?

    Initially, Dmitri Mendeleev arranged the periodic table. However, the modern arrangement is based on the atomic number (number of protons), not atomic weight. This adjustment was made following the work of Henry Moseley in 1913.


  3. Who periodic table?

    it's widely used by chemists, physicists, biologists, engineers, and science students worldwide. It's a fundamental tool in science education and research.


  4. Who invented the periodic table?

    The periodic table was invented by Dmitri Mendeleev in 1869. However, it's worth noting that other scientists, like Lothar Meyer, were also working on similar ideas around the same time.


  5. Who created the periodic table and how is it organised or arranged?

    Dmitri Mendeleev created the periodic table. In the modern version, the elements are arranged in order of increasing atomic number. The table is laid out in rows, or periods, which correspond to the number of energy levels or shells in an atom. The columns, or groups, contain elements with the same number of electrons in their outer shell and therefore have similar chemical properties.


  6. Who used the periodic table?

    The periodic table is used by anyone studying or working in fields that involve chemistry. This includes chemists, materials scientists, physicists, biologists, pharmacists, and students in various scientific disciplines. It's used to understand and predict how different elements will interact with each other.


  7. Who does the periodic table work?

     it works by organizing elements based on their atomic structure and chemical properties. The arrangement allows scientists to understand the relationships between different elements, predict how they will interact, and even predict the properties of elements that hadn't been discovered at the time of its creation.


    1. How is the periodic table arranged?

      The periodic table is arranged based on atomic number (the number of protons in an atom's nucleus). It has rows (periods) that correspond to the number of energy levels in an atom, and columns (groups) that contain elements with the same number of electrons in their outer shell, which results in them having similar chemical properties.


    2. How does the periodic table work?

      The periodic table works by organizing elements based on their atomic structure and chemical properties. The arrangement allows scientists to understand the relationships between different elements, predict how they will interact, and even predict the properties of elements that hadn't been discovered at the time of its creation.

    3. How many periodic tables are there?

      There is only one periodic table, but there are different representations or formats of it, such as the long form, short form, or circular versions. However, they all contain the same fundamental information about the elements.

    4. How did the periodic table develop?

      The development of the periodic table was a gradual process that involved many scientists. Dmitri Mendeleev is credited with its creation in 1869, but many before him tried to categorize elements. Mendeleev's original table was based on atomic weight, but it later shifted to atomic number after Henry Moseley's work in 1913.


    5. How many elements were in the periodic table in 2021, 2022, and 2024

       there were 118 confirmed elements on the periodic table in the year 2024


    6. How is the periodic table organized?

      The periodic table is organized in rows and columns based on atomic number and electron configuration. Elements in the same column (group) have similar properties because they have the same number of electrons in their outer shell.


    7. How much of the periodic table is elements?

      The entire periodic table is made up of elements. Each square in the table represents a unique chemical element.


    8. How much of the periodic table is metals?

      Most of the elements on the periodic table are metals, specifically around 75%.


    9. How is the periodic table classified?

      The periodic table is classified into several sections: s-block, p-block, d-block, and f-block. It also divides elements into categories based on their properties, such as alkali metals, alkaline earth metals, transition metals, post-transition metals, metalloids, nonmetals, halogens, and noble gases.


    10. How was the periodic table discovered?

      The periodic table was developed over time, but Dmitri Mendeleev is credited with its creation in 1869. He was able to arrange the elements known at that time in a way that showcased their periodic properties, leaving gaps for elements yet to be discovered.


    11. How often is the periodic table updated?

      The periodic table is updated whenever new elements are discovered and their discoveries are confirmed by the International Union of Pure and Applied Chemistry (IUPAC). This is not on a set schedule and can vary widely.


    12. How was the periodic table made?

      The periodic table was made by arranging the elements in order of increasing atomic weight, a method originally proposed by Dmitri Mendeleev. However, the modern periodic table is arranged by increasing atomic number, a change that was made after the discovery of isotopes and the work of Henry Moseley.


    13. How many periodic tables are in chemistry?

      There is one fundamental periodic table used in chemistry, but it can be represented in various ways, such as the long form or short form.

    14. How many elements are in the periodic table of 2024

      There were 118 confirmed elements on the periodic table. 


    15. How many families are in the periodic table?

      There are 18 vertical groups or "families" in the periodic table. These families include alkali metals, alkaline earth metals, transition metals, post-transition metals, metalloids, nonmetals, halogens, noble gases, and the f-block elements.


    16. How many elements are in liquid form at room temperature? 

      only two elements are liquid at room temperature: bromine (Br) and mercury (Hg).


    17. How much does a periodic table cost?

      The cost of a physical copy of the periodic table can vary widely depending on the size, material, and level of detail. You can typically find posters or laminated copies for educational use between $10 and $20. However, digital versions are often available for free online.


    18. How many times has the periodic table changed?

      The periodic table has changed many times since Dmitri Mendeleev first proposed it in 1869. It has been updated to accommodate new elements and to reflect better understandings of atomic structure and quantum mechanics. There were 63 known elements when Mendeleev first created the periodic table, and as of January  2024, there are 118 confirmed elements.


      1. Why is the periodic table important?

        The periodic table is important because it organizes all known chemical elements in a systematic and logical way. It allows scientists to understand patterns and trends among elements, predict the properties of elements, and understand how different elements will interact with each other.


      2. Why is the periodic table called the periodic table?

        The periodic table is so named because it arranges the elements in a way that periodic trends, or repeating patterns of behavior, can be observed among the elemental properties.


      3. Why is the periodic table important in chemistry?

        The periodic table is critical in chemistry as it provides a comprehensive overview of the elements and their properties, facilitating the prediction of how they will interact and combine to form compounds. It aids in understanding and interpreting chemical behavior.


      4. Why was the periodic table made?

        The periodic table was made to categorize, organize, and compare all of the chemical elements, based on their properties and behaviors. It was intended to bring order to the then-growing list of known elements.

      5. Why was the periodic table developed?

        The periodic table was developed to provide a logical system for organizing the known elements. Prior to its development, scientists struggled to understand the relationships between the various elements.