Periodic Table- How Many Elements Exist

How Many Elements Actually Exist?

The short answer: 118 confirmed elements exist on the periodic table right now. That's it. No more, no less. Scientists have verified each one through rigorous experimentation and peer review.

Of those 118, 94 occur naturally on Earth. The remaining 24 are synthetic—they only exist because physicists created them in particle accelerators by smashing atoms together.

The last four elements to be officially recognized were added in 2016: nihonium (113), moscovium (115), tennessine (117), and oganesson (118). It took years of experiments and millions of dollars to confirm each one existed.

The Discovery Timeline: A Slow Build

Humans have known about elements for thousands of years. Ancient civilizations worked with gold, silver, copper, iron, lead, tin, and mercury—seven elements they could extract and use directly.

The real breakthrough came in the 1800s when chemists started systematically identifying and categorizing elements. By 1869, Dmitri Mendeleev published the first recognizable periodic table with 63 elements.

Here's how element discovery progressed:

• Before 1800: ~30 elements discovered
• 1800-1900: ~50 more elements added
• 1900-1950: Heavy elements begin appearing
• 1950-present: Synthetic elements created in labs

Discovery has slowed dramatically. The easier elements are gone. Finding new ones now requires billion-dollar facilities and years of work.

The 118 Elements Broken Down

Elements fall into three broad categories:

Metals (≈80 elements)

The majority of the periodic table is metal. They share common properties: conductivity, malleability, and that characteristic metallic sheen. From lithium to lawrencium, metals dominate the left and center sections of the table.

Subcategories include:

• Alkali metals (Li, Na, K, etc.) — violently reactive with water
• Alkaline earth metals (Mg, Ca, Sr, etc.) — less reactive, still dangerous
• Transition metals (Fe, Cu, Zn, etc.) — the industrial workhorses
• Post-transition metals (Al, Ga, In, etc.) — softer, more reactive than transition metals
• Heavy metals (Hg, Pb, U, etc.) — toxic at certain concentrations

Nonmetals (≈17 elements)

Nonmetals lack metallic properties. They're typically poor conductors and tend to be brittle when solid. The most important for life: oxygen, carbon, nitrogen, and hydrogen.

Most nonmetals cluster in the upper right of the periodic table. Hydrogen breaks the mold—it's placed alone at the top left because its properties don't fit anywhere else cleanly.

Metalloids (≈7 elements)

These are the fence-sitters. They have properties of both metals and nonmetals. The seven recognized metalloids are:

• Boron (B)
• Silicon (Si)
• Germanium (Ge)
• Arsenic (As)
• Antimony (Sb)
• Tellurium (Te)
• Polonium (Po)

Silicon is the most important economically—it's the foundation of all computer chips and solar cells.

How the Periodic Table Is Organized

The table isn't random. Each element's position tells you something specific:

• Atomic number (top of each box) — number of protons in the nucleus. This defines the element.
• Period (horizontal rows) — indicates the number of electron shells
• Group (vertical columns) — elements in the same group share similar chemical behavior

Group Names Worth Knowing

Some groups have specific names that come up in chemistry:

• Group 1 — Alkali metals
• Group 2 — Alkaline earth metals
• Groups 3-12 — Transition metals
• Group 17 — Halogens
• Group 18 — Noble gases

Noble gases (He, Ne, Ar, Kr, Xe, Rn) are notable because they barely react with anything. They used to be called "inert gases" for this reason.

Natural vs. Synthetic Elements

Not all 118 elements are equally available:

Some synthetic elements decay so quickly they've only existed for fractions of a second in experiments. Oganesson (element 118) was first created in 2002—and researchers have produced fewer than 100 atoms of it total.

Why Some Elements Are Synthetic

Heavy elements beyond uranium (92) don't exist in significant quantities on Earth because they're radioactively unstable. They decay into lighter elements over time.

To create new ones, scientists:

• Shoot heavy ions at target atoms using particle accelerators
• Hope the nuclei fuse together instead of shattering apart
• Detect the resulting atoms before they decay (sometimes milliseconds)

It's expensive, slow, and often produces nothing. The four newest elements were confirmed after years of failed attempts and debates about whether the signals were real.

Will We Find More Elements?

Possibly, but the odds decrease as atomic numbers climb. Theoretically, the "island of stability" might contain superheavy elements that last longer than current synthetic ones—but nobody has reached it yet.

Most physicists estimate the upper limit is somewhere between 126 and 137 protons. Beyond that, the nucleus becomes fundamentally unstable no matter how you arrange it.

Until someone proves otherwise: 118 is the current count.

Getting Started: How to Read the Periodic Table

You don't need a chemistry degree to use the periodic table. Here's the minimum you need:

1. Find the atomic number — the top number tells you how many protons are in one atom of that element
2. Check the symbol — one or two letters that represent the element (H for hydrogen, He for helium)
3. Look at the period and group — these tell you about electron configuration and chemical behavior
4. Note the atomic mass — the bottom number, roughly equal to protons plus neutrons

That's it. With those four pieces of information, you can understand most chemistry at a basic level.

Quick Reference: Most Abundant Elements in the Earth's Crust

Together, oxygen and silicon make up nearly 75% of Earth's crust. Everything else fights for the remaining quarter.

Bottom Line

118 elements exist. 94 are natural, 24 are synthetic. The periodic table organizes them by atomic number, with rows (periods) and columns (groups) that predict chemical behavior.

You don't need to memorize all 118. Learn the major groups, the common elements, and how to read the basic information in each box. That's enough to follow along in most chemistry discussions.