what do group of atoms form?
608500
Group of atoms form a molecule.\n\nA molecule can be made of two or more atoms. This atoms can be of the same type:\n\nCl2, H2, O2...\nO2= an oxygen molecule. It is made of two equal oxygen atoms\n\nOr of different types:\n\nCH4, HCl, NH3...\nCH4 = a methane molecule. It is made of 1 atom of Carbon and 4 equal atoms of hydrogen
30463
The short answer is no, they do not form compounds easily.\n\nHowever, your question had me thinking about WHY they are called nobel gases, and how often they form compounds. Apparently, the noble gases (helium, neon, argon, krypton, xenon, radon and ununoctium) got their name from the noble metals, because it was thought that the noble gases would not form compounds, just like the noble metals (gold, silver, tantalum, platinum, and palladium) that were resistant to corrosion and therefore special (and "regal" and valuable).\n\nNoble gases were originally called rare gases, but this is a bit of a misnomer since argon is a significant component of the earth's atmosphere (0.93% by volume, 1.29% by mass). They were then called inert gases, but this is also incorrect since under some conditions they will react with other materials. \n\nThe noble gases can form oxides, flurides, and halides under special conditions, as well as hydrates, clathrates and coordination compounds.
45661
This is a very difficult question to answer that doesn't have a short answer.  What you are referring to is called condensation chemistry.  In the early solar system as the Sun was forming all the elements now in the solar system were in single atomic form because they were so hot.  As the solar system cooled these elements were able to form into various compounds and molecules.  Here is where it gets difficult.  Each element has its own condensation sequence that is dependent on temperature and pressure.
886443
Obviously, an atom isn't the smallest particle since they are composed of sub-atomic particles.  An atom however is the smallest component of an element having the chemical properties of the element.  Once you go beyond an atom of any element, the components no longer keep the properties of that element.
1163963
Do you mean the molecular composition or macroscopic composition? There would be too much to post here so I suggest you visit the following\n\nhttp://users.rcn.com/jkimball.ma.ultranet/BiologyPages/B/Blood.html#formation
920660
1a.) So you do not end up with more of one element than you started out with, elements cannot be created or destroyed in chemical reactions\n1b.) in a physical change, the elements do not combine with other elements- it remains the same substance (i.e. cutting paper or melting ice) a chemical change happens when chemical properties are changed, and new substances are formed (i.e. burning, baking soda and vinegar)\n2.) organic compounds an be found in living things, soil, or near anywhere living organisms are.\n3.) Carbon, Hydrogen
1134735
Within the first three minutes, matter (in the form of protons and neutrons) were formed and created Hydrogen isotopes.  But the first stable atoms that we usually think of didn't occur until electrons could form.\n\nAround 300,000 years after the big bang the universe had cooled enough to allow atoms to form.  Before this time, the universe was too hot to allow electrons to combine with nuclei.  In this time-frame  the universe was dominated by radiation, whereas now, the universe is dominated by matter.
899898
I'm guessing by 'the atomic model' of the atom, you mean the correct model. It was proposed by bohr, and is essentially the same as the rutherford model except that the electrons are held into shells. Note the wikipedia article below.\nas for the reactivity of different groups, you need to read about valence electrons. They're the number of electrons in the incomplete (outermost) electron shell -- group 1 has 1 valence electron, group 17 has one MISSING valence electron. Atoms are more stable when they have 'full' shells, and no incomplete ones, so the group 1 atoms will try to 'give away' their extra electron, while the group 17 atom will try and 'take away' one more electron to complete its shell.
158743
One of these scientists, a man named Democritus, would sit here in the central market place of Athens, Greece, and explain to one and all how all things on earth and in the heavens are made of extremely tiny, simple particles. He called them "atoms.o/oo \n\n\nThus when the element hydrogen combines with the element oxygen, it must do so all or none. In the case of water, for instance, one atom of oxygen combines with two atoms of hydrogen. Now when oxygen combines with carbon to make carbon dioxide, two oxygen atoms combine with one carbon atom. And when they make carbon monoxide, it is one atom oxygen to one atom carbon. So, too, all other chemical compounds are made of a simple combination of a few basic atoms.
1086275
In scientific terms atoms are the smallest possible particle of a chemical element that retains its chemical properties. All atoms are made of the same basic elements, protons, neutrons and electrons , but each of the individual elements are made from different organizations of these materials. The basic structure of an atom is the nucleus, which is made of protons and neutrons (except hydrogen which only has a proton), and the electrons which, to over simplify it, "orbit" the nucleus. Elements are defined however by the number of protons in the nucleus, carbon always has 6 protons in it's nucleus, oxygen always has 8.\n\nAtoms are found EVERYWHERE. Everything you are, the air you breath, the things you smell, are all made of atoms, as others have said, it is the basic building block of everything, literally nothing would exist without them.\n\nIsotopes, contrary to what was said above, are in fact atoms, just a special kind of atom. The have the same amount of protons in their nucleus, hence they stay the same kind of element, but the have a different number of neutrons. I said above that hydrogen doesn't have a neutron in it's nucleus, and a standard hydrogen atom doesn't, but an isotope of hydrogen does, it's called deuterium, and it has 1 proton and 1 neutron in it's nucleus.\n\nDon't feel bad if you don't get it still, it really takes a class in chemistry to really get a handle on what exactly it all means. Good luck.
759104
what is the atom made of and explain how they work?
77790
Cations are particles with a positive charge, while anions are particles with negative charge. Cations are formed when an atom loses electrons, while anions are formed when an atom gains electrons. Among the atoms, the alkali metals (Group 1) and alkaline-earth metals (Group 2) are the most reactive metals, having one and two valence electrons, respectively. Therefore, metals lose that electrons and form cations.
246850
When the nucei of elements form, they are more or less stable combinations of protons and neutrons.  Unstable groupings decay usually in microseconds, or dont form at all.  For any given element, there is usually more than one stable number of neutrons for any given number of protons (the number of protons determine which element it is, the total number of protons and neutrons determine the molecular weight, and thus the isotope).  Often, one type of isotope is much much more stable or more energetically easy to form than others.  So, for example, usually oxygen has 8 protons and 8 neutrons-but sometimes it has 9 neutrons.  During the original formation process, which for larger elements usually occur during a violent nova or supernova explosion of a star, there are lots of free protons and neutrons, or naked nuclei of smaller atoms, being energetically smashed together.  So, just by chance, most will be the most stable or most easly formed nuclei, but a few will be slightly different.
873640
All form diatomic molecules, are highly reactive, and as elements are colored.  They can form ionic compounds with electropositive metals, and substitute for hydrogen in hydrocarbons to make a vast array of compounds.  All have stable isotopes except astatine.
844206
The answer is simple. All elements (whose basic units are atoms) except the noble gases, have less than 8 electrons in their valence shells.  The rule that states that atoms should have 8 electrons to achieve stability is called The Octet Rule.\n\nhttp://en.wikipedia.org/wiki/Octet_rule\n\nThe way that they can attain 8 electrons is by forming BONDS: by either sharing electrons (covalent bond) or by gaining/losing electrons (ionic bond).   This is the main reason why atoms react: to attain 8 valence electrons.\n\nIf we look at it at another angle, we can say that atoms react in order to decrease energy.  This comes from the principle that bond formation results in loss of energy, and that stability comes from decreased energy.\n\nHope that helps.
719935
Atoms don't get pulled around by electrons. The electrons orbit around the nucleus of an atom. The electrostatic attraction between the protons in the nucleus and the electrons is what keeps the electrons orbiting. When atoms form molecules, it is electrons that hold the atoms bonded to one another... electrons are "shared" by the various nuclei in the molecule. In other words, the electron orbits (orbitals) from neighboring atoms overlap, and the electrons can move freely within the system of overlapped orbitals.
951092
a group of cells form a tissue