Atom
noun
The smallest unit of a chemical element that still keeps its properties.
An oxygen atom combines with two hydrogen atoms to form a molecule of water.
noun
An extremely small amount of something.
There is not an atom of truth in his accusations.
Usage tips
Disapproving
noun
In computing, it refers to a basic unit of data with metadata, commonly in web feeds.
RSS and Atom are popular XML-based feed formats.
Often appears as...
- atom feed
- atom format
noun
The smallest unit of a chemical element that still keeps its properties.
An oxygen atom combines with two hydrogen atoms to form a molecule of water.
noun
An extremely small amount of something.
There is not an atom of truth in his accusations.
Usage tips
Disapproving
noun
In computing, it refers to a basic unit of data with metadata, commonly in web feeds.
RSS and Atom are popular XML-based feed formats.
Often appears as...
- atom feed
- atom format
Definition 1 of 3
Pro Tip 1/3Chemical Composition
Atoms bond together to form molecules, which make up matter.
Water is composed of hydrogen and oxygen atoms.
Pro Tip 2/3Indivisible Concept
Historically, atoms were thought to be indivisible; now we know they consist of smaller particles.
Atoms are made up of protons, neutrons, and electrons.
Pro Tip 3/3Unique Identity
Every element on the periodic table is defined by the number of protons in its atoms.
Carbon atoms have six protons each.
Pro Tip 1/3Chemical Composition
Atoms bond together to form molecules, which make up matter.
Water is composed of hydrogen and oxygen atoms.
Pro Tip 2/3Indivisible Concept
Historically, atoms were thought to be indivisible; now we know they consist of smaller particles.
Atoms are made up of protons, neutrons, and electrons.
Pro Tip 3/3Unique Identity
Every element on the periodic table is defined by the number of protons in its atoms.
Carbon atoms have six protons each.
Pro Tip 1/3Chemical Composition
Atoms bond together to form molecules, which make up matter.
Water is composed of hydrogen and oxygen atoms.
Pro Tip 2/3Indivisible Concept
Historically, atoms were thought to be indivisible; now we know they consist of smaller particles.
Atoms are made up of protons, neutrons, and electrons.
Pro Tip 3/3Unique Identity
Every element on the periodic table is defined by the number of protons in its atoms.
Carbon atoms have six protons each.
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Video examples
Just How Small is an...
So you ask, just how small are atoms? To understand this, let's ask this How many atoms are in a grapefruit? Well, let's assume that the grapefruit is made up of only nitrogen atoms, which isn't at all true, but there are nitrogen atoms in a grapefruit. To help you visualize this, let's blow up each of the atoms
Video examples
Questions No One Knows...
is intimately connected to those distant, invisible galaxies. We can think of them as part of our universe. They make up a single, giant edifice obeying the same physical laws and all made from the same types of atoms, electrons, protons, quarks, neutrinos, that make up you and me.
Video examples
The law of conservation...
in the three minutes that followed the birth of our universe. Eventually, clusters of atoms accumulated and formed stars. Within these stars, nuclear reactions fused light elements, such as hydrogen and helium, to form heavier elements, such as carbon and oxygen.
Video examples
Julian Baggini: Is there...
are hydrogen and oxygen atoms, and that's what water is. Of course we don't. We understand, very easily, very straightforwardly, that water is nothing more than the hydrogen and oxygen molecules suitably arranged. Everything else in the universe is the same.
Video examples
What is the Smallest...
ultimately depends on the basic laws of physics it depends on the size of molecules which depends on the size of atoms which depends on fundamental properties of the universe like the strength of the force of electromagnetism and the mass of an
Video examples
Where does gold come...
that create gold in stars. But these machines can only construct gold atom by atom. So it would take almost the age of the universe to produce one gram at a cost vastly exceeding the current value of gold. So that's not a very good solution.
Video examples
Is it possible to create...
The universe is bustling with matter and energy. Even in the vast apparent emptiness of intergalactic space, there's one hydrogen atom per cubic meter. That's not the mention a barrage of particles
Video examples
Harnessing the Power of...
forever the challenges is making fusion work at the National Ignition facility what we're trying to do is overcome a natural barrier that nature has set up for atoms to fuse together
Video examples
The invisible motion of...
But look deep into the atomic structure of any of them, and you'll see a world in constant flux. Stretching, contracting, springing, jittering, drifting atoms everywhere.
Video examples
Giving checkmate is...
combinations than atoms in the universe just was and still is after today in male-dominated sport was it realistic from my parents to think that I can
Video examples
Just How Small is an...
So you ask, just how small are atoms? To understand this, let's ask this How many atoms are in a grapefruit? Well, let's assume that the grapefruit is made up of only nitrogen atoms, which isn't at all true, but there are nitrogen atoms in a grapefruit. To help you visualize this, let's blow up each of the atoms
Video examples
Questions No One Knows...
is intimately connected to those distant, invisible galaxies. We can think of them as part of our universe. They make up a single, giant edifice obeying the same physical laws and all made from the same types of atoms, electrons, protons, quarks, neutrinos, that make up you and me.
Video examples
The law of conservation...
in the three minutes that followed the birth of our universe. Eventually, clusters of atoms accumulated and formed stars. Within these stars, nuclear reactions fused light elements, such as hydrogen and helium, to form heavier elements, such as carbon and oxygen.
Video examples
Julian Baggini: Is there...
are hydrogen and oxygen atoms, and that's what water is. Of course we don't. We understand, very easily, very straightforwardly, that water is nothing more than the hydrogen and oxygen molecules suitably arranged. Everything else in the universe is the same.
Video examples
What is the Smallest...
ultimately depends on the basic laws of physics it depends on the size of molecules which depends on the size of atoms which depends on fundamental properties of the universe like the strength of the force of electromagnetism and the mass of an
Video examples
Where does gold come...
that create gold in stars. But these machines can only construct gold atom by atom. So it would take almost the age of the universe to produce one gram at a cost vastly exceeding the current value of gold. So that's not a very good solution.
Video examples
Is it possible to create...
The universe is bustling with matter and energy. Even in the vast apparent emptiness of intergalactic space, there's one hydrogen atom per cubic meter. That's not the mention a barrage of particles
Video examples
Harnessing the Power of...
forever the challenges is making fusion work at the National Ignition facility what we're trying to do is overcome a natural barrier that nature has set up for atoms to fuse together
Video examples
The invisible motion of...
But look deep into the atomic structure of any of them, and you'll see a world in constant flux. Stretching, contracting, springing, jittering, drifting atoms everywhere.
Video examples
Giving checkmate is...
combinations than atoms in the universe just was and still is after today in male-dominated sport was it realistic from my parents to think that I can
Example 1 of 10
Quote examples
Richard P. Feynman
American Physicist
It has been discovered that all the world is made of the same atoms, that the stars are of the same stuff as ourselves. It then becomes a question of where our stuff came from. Not just where did life come from, or where did the earth come from, but where did the stuff of life and of the earth come from?
Quote examples
Mitch Kapor
American Businessman
In an economy where more and more value is in information - is in the bits, not the atoms, where bits can be copied essentially for free - any time you have that situation, economic schemes that rely on existing models of intellectual property laws for protection are going to do less and less well.
Quote examples
Gerard De Nerval
French Novelist
It has been rightly said that nothing is unimportant, nothing powerless in the universe; a single atom can dissolve everything, and save everything! What terror! There lies the eternal distinction between good and evil.
Quote examples
Willard Libby
American Scientist
We hope that this honor you have done us will bring the time of further realization of these benefits closer and will help all mankind to live better and be happier through the atom and isotopes.
Quote examples
Annalee Newitz
American Journalist
Evolution, climate change, and the construction of the physical universe down to its atoms are processes that we measure in millions or billions of years.
Quote examples
Tim Crouch
Director
As actors, we do our best to keep things light and to encourage in the audience an openness to the changing atoms in the room.
Quote examples
James Jeans
English Physicist
Life exists in the universe only because the carbon atom possesses certain exceptional properties.
Quote examples
Diana Vreeland
American Editor
The bikini is the most important thing since the atom bomb.
Quote examples
Kyle Hill
American Author
Human atoms are the notes, their life the symphony.
Quote examples
Muriel Rukeyser
American Poet
The universe is made of stories, not of atoms.
Quote examples
Richard P. Feynman
American Physicist
It has been discovered that all the world is made of the same atoms, that the stars are of the same stuff as ourselves. It then becomes a question of where our stuff came from. Not just where did life come from, or where did the earth come from, but where did the stuff of life and of the earth come from?
Quote examples
Mitch Kapor
American Businessman
In an economy where more and more value is in information - is in the bits, not the atoms, where bits can be copied essentially for free - any time you have that situation, economic schemes that rely on existing models of intellectual property laws for protection are going to do less and less well.
Quote examples
Gerard De Nerval
French Novelist
It has been rightly said that nothing is unimportant, nothing powerless in the universe; a single atom can dissolve everything, and save everything! What terror! There lies the eternal distinction between good and evil.
Quote examples
Willard Libby
American Scientist
We hope that this honor you have done us will bring the time of further realization of these benefits closer and will help all mankind to live better and be happier through the atom and isotopes.
Quote examples
Annalee Newitz
American Journalist
Evolution, climate change, and the construction of the physical universe down to its atoms are processes that we measure in millions or billions of years.
Quote examples
Tim Crouch
Director
As actors, we do our best to keep things light and to encourage in the audience an openness to the changing atoms in the room.
Quote examples
James Jeans
English Physicist
Life exists in the universe only because the carbon atom possesses certain exceptional properties.
Quote examples
Diana Vreeland
American Editor
The bikini is the most important thing since the atom bomb.
Quote examples
Kyle Hill
American Author
Human atoms are the notes, their life the symphony.
Quote examples
Muriel Rukeyser
American Poet
The universe is made of stories, not of atoms.
Example 1 of 10
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