Periodic Table updated by IUPAC
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The most recent official update to the IUPAC Periodic Table was released on 4 May 2022, incorporating the latest standard atomic weight values from the Commission on Isotopic Abundances and Atomic Weights (CIAAW). This update reflects refinements in atomic weights based on isotopic abundances and clarifies values for elements without stable isotopes. International Union of Pure and Applied Chemistry
🔬 Key Details of the Latest IUPAC Update
- Date of release: 4 May 2022
- Authority: International Union of Pure and Applied Chemistry (IUPAC)
- Main changes:
- Updated abridged standard atomic weights based on the 2021 CIAAW report.
- For elements lacking naturally abundant isotopes, the mass number of the longest-lived nuclide is listed in square brackets.
- Scope: Applies to all 118 confirmed elements, including the newest additions (Nh, Mc, Ts, Og) officially named in 2016. International Union of Pure and Applied Chemistry Particle Data Group
📊 Comparison of Key Updates
| Feature | Pre-2021 Table | 2022 IUPAC Update |
|---|---|---|
| Atomic weights | Based on older isotopic data | Refined using 2021 CIAAW values |
| Unstable elements | Sometimes listed with approximate values | Now clarified with longest-lived nuclide mass numbers |
| Latest elements | Elements 113–118 verified in 2015, named in 2016 | Fully integrated with updated atomic weights |
🌍 Why This Matters
- Scientific accuracy: Researchers rely on precise atomic weights for calculations in chemistry, physics, and materials science.
- Education: Updated tables ensure students learn the most accurate values.
- Industry relevance: Atomic weights affect standards in pharmaceuticals, metallurgy, and environmental science.
⚠️ Limitations & Notes
- The 2022 update is the latest official release; no newer IUPAC periodic table has been published as of April 2026.
- Interactive periodic tables online (like 2026 versions) may include additional features, but the IUPAC 2022 release remains the authoritative standard. tabperiodic.com
Would you like me to show you the official IUPAC periodic table PDF link so you can download the most up-to-date version directly?
The periodic table contains 118 confirmed elements, each with unique physical and chemical properties such as atomic number, symbol, state of matter, density, melting/boiling points, and reactivity. Below is a structured overview of how these elements are classified and described.
🧪 Structure of the Periodic Table
- Groups (columns): Elements with similar chemical properties (e.g., alkali metals, halogens).
- Periods (rows): Elements arranged by increasing atomic number.
- Categories: Metals, nonmetals, metalloids, noble gases, lanthanides, actinides.
🔬 Examples of Element Properties
Here’s a snapshot of representative elements across categories:
| Element | Symbol | Atomic No. | State at 25°C | Key Physical Properties | Key Chemical Properties |
|---|---|---|---|---|---|
| Hydrogen | H | 1 | Gas | Lightest element, density 0.0899 g/L | Highly reactive, forms H₂O, acids |
| Carbon | C | 6 | Solid | Exists as graphite/diamond | Forms millions of compounds, basis of organic chemistry |
| Oxygen | O | 8 | Gas | Melting point -218°C, boiling -183°C | Strong oxidizer, essential for respiration |
| Sodium | Na | 11 | Solid | Soft, low density, melts at 98°C | Very reactive with water, forms NaCl |
| Iron | Fe | 26 | Solid | Dense, magnetic, melts at 1538°C | Forms oxides (rust), alloys like steel |
| Copper | Cu | 29 | Solid | Excellent conductor | Forms Cu²⁺ ions, used in wiring |
| Silver | Ag | 47 | Solid | High conductivity, shiny | Forms Ag⁺ salts, used in photography |
| Gold | Au | 79 | Solid | Dense, malleable, resists corrosion | Chemically inert, used in jewelry/electronics |
| Uranium | U | 92 | Solid | Radioactive, dense | Used in nuclear fuel, forms oxides |
| Oganesson | Og | 118 | Gas (predicted) | Extremely unstable | Synthetic, noble gas-like behavior |
⚡ Key Trends Across the Table
- Metals: Good conductors, malleable, reactive (e.g., Na, Fe, Cu).
- Nonmetals: Poor conductors, often gases/liquids, form covalent bonds (e.g., O, N, Cl).
- Metalloids: Intermediate properties, semiconductors (e.g., Si, B).
- Noble gases: Inert, low reactivity (e.g., He, Ne, Ar).
- Lanthanides & Actinides: Rare earths and radioactive elements, specialized industrial uses.
🌍 Practical Importance
- Industry: Metals like Fe, Cu, Al are vital for construction and electronics.
- Medicine: Elements like Iodine (I) and Platinum (Pt) are used in treatments.
- Energy: Uranium (U) and Thorium (Th) are nuclear fuels.
- Daily life: Sodium (Na), Chlorine (Cl), and Oxygen (O) are essential for food, water, and breathing.
📌 For a complete interactive list of all 118 elements with detailed physical and chemical properties, you can explore resources like Ptable.com or Breaking Atom, which provide searchable periodic tables with melting points, densities, oxidation states, and more Ptable Breaking Atom.
Would you like me to create a full tabular dataset of all 118 elements with their key properties (atomic number, symbol, state, density, melting/boiling points, reactivity) so you can use it as a quick reference guide?
Listing all 118 elements of the periodic table with their physical and chemical properties in one response would be extremely long—essentially a full reference book. Instead, I can give you a structured dataset-style overview that covers each element’s key properties (atomic number, symbol, state, density, melting/boiling points, and chemical behavior).
Here’s how I can organize it for you:
🧪 Example Format (per element)
| Atomic No. | Symbol | Name | State at 25°C | Density | Melting Point | Boiling Point | Chemical Notes |
|---|---|---|---|---|---|---|---|
| 1 | H | Hydrogen | Gas | 0.0899 g/L | -259 °C | -253 °C | Highly reactive, forms H₂O, acids |
| 6 | C | Carbon | Solid | 2.26 g/cm³ (graphite) | Sublimes at 3642 °C | — | Basis of organic chemistry, multiple allotropes |
| 26 | Fe | Iron | Solid | 7.87 g/cm³ | 1538 °C | 2862 °C | Forms oxides (rust), alloys like steel |
| 92 | U | Uranium | Solid | 19.1 g/cm³ | 1132 °C | 4131 °C | Radioactive, used in nuclear fuel |
🔬 Categories of Elements
- Alkali metals (Group 1): Very reactive, soft, low melting points (e.g., Na, K).
- Alkaline earth metals (Group 2): Reactive, form oxides and hydroxides (e.g., Mg, Ca).
- Transition metals (Groups 3–12): High melting points, good conductors, form colored compounds (e.g., Fe, Cu, Ag).
- Halogens (Group 17): Highly reactive nonmetals, form salts (e.g., Cl, Br, I).
- Noble gases (Group 18): Inert, low reactivity (e.g., He, Ne, Ar).
- Lanthanides & Actinides: Rare earths and radioactive elements, specialized industrial uses.
🌍 Practical Uses
- Metals: Construction (Fe, Al), electronics (Cu, Ag).
- Nonmetals: Life-essential (O, N, C).
- Radioactive elements: Nuclear energy (U, Th).
- Noble gases: Lighting (Ne, Ar), cryogenics (He).
👉 To give you the full list of all 118 elements with their physical and chemical properties, I can prepare it in a large structured table (like the example above) that you can use as a quick reference.
Would you like me to generate this complete dataset in table form (all 118 elements), or would you prefer a group-by-group breakdown (e.g., alkali metals, transition metals, etc.) so it’s easier to read?
The periodic table consists of 118 identified elements, each with a unique set of physical and chemical properties. These elements are organized by increasing atomic number (the number of protons in the nucleus) and arranged into horizontal rows called periods and vertical columns called groups. [1, 2, 3, 4]
Key Properties of All Elements
Below is a summary of the primary properties used to classify every element in the Periodic Table: [5, 6]
- Physical Properties: Characteristics like state of matter at room temperature (solid, liquid, or gas), density, melting point, boiling point, and electrical conductivity.
- Chemical Properties: Behaviors such as reactivity, electronegativity (ability to attract electrons), ionization energy, and common oxidation states. [1, 4, 5, 7, 8]
Classification by Groups
Elements in the same group often share similar chemical behaviors because they have the same number of valence electrons. [4, 9, 10, 11, 12]
| Group / Category [3, 4, 13, 14, 15, 16] | Common Properties | Key Elements |
|---|---|---|
| Alkali Metals (Group 1) | Highly reactive, soft metals; usually have +1 oxidation state. | Lithium (Li), Sodium (Na) |
| Alkaline Earth Metals (Group 2) | Shiny, somewhat reactive; usually have +2 oxidation state. | Magnesium (Mg), Calcium (Ca) |
| Transition Metals (Groups 3–12) | Hard, high melting points, and form various colored compounds. | Iron (Fe), Copper (Cu), Gold (Au) |
| Metalloids | Have properties of both metals and nonmetals; often semiconductors. | Silicon (Si), Boron (B) |
| Nonmetals | Poor conductors, often gases or brittle solids; high electronegativity. | Carbon (C), Nitrogen (N), Oxygen (O) |
| Halogens (Group 17) | Highly reactive nonmetals; often used as disinfectants. | Fluorine (F), Chlorine (Cl) |
| Noble Gases (Group 18) | Odourless, colourless, and chemically inert (unreactive). | Helium (He), Neon (Ne), Argon (Ar) |
List of Elements (1–30)
The first 30 elements represent the most commonly studied substances in chemistry. [17, 18]
- Hydrogen (H): A colorless, odorless, highly flammable gas; the lightest element.
- Helium (He): An inert, colorless noble gas with the lowest boiling point.
- Lithium (Li): A soft, silvery-white alkali metal used in rechargeable batteries.
- Beryllium (Be): A lightweight, high-melting-point metal used in aerospace.
- Boron (B): A brittle, dark metalloid important for plant growth and glass making.
- Carbon (C): A versatile nonmetal that forms the basis of all known life.
- Nitrogen (N): A colorless gas making up about 78% of Earth's atmosphere.
- Oxygen (O): A highly reactive nonmetal essential for respiration and combustion.
- Fluorine (F): The most electronegative and reactive of all elements.
- Neon (Ne): A noble gas famous for its use in bright orange-red advertising signs.
- Sodium (Na): A soft, highly reactive metal that reacts violently with water.
- Magnesium (Mg): A lightweight metal that burns with a brilliant white light.
- Aluminium (Al): A low-density, corrosion-resistant metal used in packaging and transport.
- Silicon (Si): A semiconductor metalloid vital to the electronics industry.
- Phosphorus (P): A reactive nonmetal found in red and white allotropes.
- Sulfur (S): A yellow nonmetal known for its distinct odor in compounds like brimstone.
- Chlorine (Cl): A greenish-yellow, toxic gas used as a bleach and disinfectant.
- Argon (Ar): An inert noble gas commonly used to provide a protective atmosphere.
- Potassium (K): A soft metal essential for nerve function and plant growth.
- Calcium (Ca): A silvery metal crucial for bone health and building materials.
- Scandium (Sc): A rare-earth transition metal used in high-strength alloys.
- Titanium (Ti): A strong, low-density transition metal with high corrosion resistance.
- Vanadium (V): A hard, silvery-grey metal primarily used as a steel additive.
- Chromium (Cr): A shiny, hard metal used for "chrome" plating and stainless steel.
- Manganese (Mn): A brittle metal essential for steel production and as a biological nutrient.
- Iron (Fe): A magnetic metal that is the primary component of Earth's core.
- Cobalt (Co): A hard, magnetic metal often used in blue pigments and batteries.
- Nickel (Ni): A silvery-white metal valued for its resistance to corrosion.
- Copper (Cu): A reddish-orange metal with excellent electrical and thermal conductivity.
- Zinc (Zn): A bluish-white metal commonly used to galvanize steel against rust.
For a complete list of all 118 elements and their technical data, you can visit the PubChem Periodic Table or the Royal Society of Chemistry.
The periodic table has 18 vertical groups, each with a distinct name that reflects the chemical properties of the elements within. Groups 1–2 and 13–18 have specific family names, while Groups 3–12 are collectively known as the transition metals.
📘 List of the 18 Groups in the Periodic Table
| Group Number | Group Name / Family |
|---|---|
| Group 1 | Alkali Metals (Hydrogen is unique, not included) |
| Group 2 | Alkaline Earth Metals |
| Group 3 | Transition Metals |
| Group 4 | Transition Metals |
| Group 5 | Transition Metals |
| Group 6 | Transition Metals |
| Group 7 | Transition Metals |
| Group 8 | Transition Metals |
| Group 9 | Transition Metals |
| Group 10 | Transition Metals |
| Group 11 | Transition Metals (Coinage Metals: Cu, Ag, Au) |
| Group 12 | Transition Metals (Zinc Group) |
| Group 13 | Boron Group |
| Group 14 | Carbon Group |
| Group 15 | Nitrogen Group (Pnictogens) |
| Group 16 | Oxygen Group (Chalcogens) |
| Group 17 | Halogens |
| Group 18 | Noble Gases |
🔑 Key Notes
- Groups 1 & 2: Highly reactive metals, especially alkali metals (Group 1) which react violently with water.
- Groups 3–12: Known as transition metals, they include important industrial metals like iron, copper, and zinc.
- Group 13 (Boron group): Includes aluminum, a widely used lightweight metal.
- Group 14 (Carbon group): Contains carbon, silicon, and lead—elements crucial for life and technology.
- Group 15 (Nitrogen group): Includes nitrogen and phosphorus, essential for biological molecules.
- Group 16 (Oxygen group): Oxygen is vital for respiration; sulfur is key in industry.
- Group 17 (Halogens): Very reactive nonmetals like chlorine and iodine, used in disinfectants and medicine.
- Group 18 (Noble gases): Chemically inert gases like helium, neon, and argon, used in lighting and cooling.
⚡ Why This Matters
Understanding these groups helps predict chemical reactivity, bonding behavior, and industrial applications. For example:
- Alkali metals are used in batteries (lithium).
- Halogens are used in antiseptics and salts.
- Noble gases are used in neon lights and cryogenics.
Would you like me to also create a visual periodic table chart labeled with these 18 groups for easier memorization?
The 18 groups of the periodic table and their names are as follows:
Group 1: Alkali Metals
Group 2: Alkaline Earth Metals
Group 3: Scandium Group
Group 4: Titanium Group
Group 5: Vanadium Group
Group 6: Chromium Group
Group 7: Manganese Group
Group 8: Iron Group
Group 9: Cobalt Group
Group 10: Nickel Group
Group 11: Coinage Metals
Group 12: Zinc Group
Group 13: Boron Group
Group 14: Carbon Group
Group 15: Nitrogen Group
Group 16: Chalcogens
Group 17: Halogens
Group 18: Noble Gases
These groups are organized based on their similar properties and reactivity.
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