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An atom is the smallest bit of an element that you can have. It contains a nucleus (which is made up of protons and (with the exception of hydrogen) neutrons. Around the nucleus are electrons. The quantity of all these things will depend on what element we are talking about amd are specific to that element. If you go any smaller then you do not have the element any more (apart from the situation where one or more electrons can be lost to or gained from another element when the two elements combine in a compound). A combination of atoms, either the same type of atoms or different ones, is called a molecule.
So, an atom is the smallest whole piece of an element, and it conatins electrons. One or more atoms joined together is a molecule.
What else can I help you with?
Describe the bonding in a water molecule?
A water (H2O) molecule is held together by covalent bonds. Since oxygen has a higer electronegativity than hydrogen, the bonding electron pairs tend towards the oxygen atom, making the oxygen atom a slight negative pole and the hydrogen atoms positive poles. With the additional V shape of the molecule that comes from oxygen's free electron pairs, the slightly polar bonds make the molecule a dipole with the negative pole on oxygen's side and the positive pole in the center between the hydrogen atoms. (This polarity is why a stream of water can be manipulated with a magnet.) The H2O molecule does not conduct electricity as there are no delocalised electrons.
What is a bipolar molecule?
I believe what your talking about is ELECTRO-NEGATIVITY, the pull exerted by electrons as not all electrons are shared equally between two bonded atoms, a ' molecule' being two or more atoms held together by a special chemical bond. Electrons will be attracted more to the atom with the higher electronegativity. Examples of these kind of atoms are oxygen, and nitrogen. A "non-polar" bond occurs when the electronegativities are exactly the same and possession is shared but what you term 'bipolar molecules' is actually the process when the electronegativity is so strong that the atom is able to TAKE the electron of another atom, known as IONIC BONDING.
When one atom loses an electron and another accepts that electron?
It depends on the exact situation. Probably ions Well this answer is vaguely correct. When an atom gains or loses an electron it becomes an ion. Ions with a net positive charge are called cations and ions with a net negative charge are anions. This allows for an ionic bond to occur. An ionic bond occurs when an anion binds with a cation.
Could an atom ever lose a electron without another atom gaining one?
Yes. An atom can lose an electron without another atom gaining one. It happens quite frequently in atom smashers. Scientists strip off all the electrons and crash the nucleus of one atom into other atoms. And they even get paid to do it!
When a molecule of NAD gains a hydrogen atom the molecule becomes?
When a molecule of NAD gains a hydrogen atom, it becomes reduced to form NADH (nicotinamide adenine dinucleotide). This reduction reaction involves the transfer of electrons from the hydrogen atom to NAD, resulting in the formation of NADH.
What happens when an atom that looses an electron comes in contact with an atom that has gained an electron?
An ionic molecule is formed.
Why the electron affinity is important?
Electron affinity for an atom is important to make it as a molecule.where atom is a small single one and molecule is the combination of two or more atoms.electron affinity is just a desire for attraction of electron by the atom.for example : We should have some affection for others to become their close relation like friends and live together in the same way a single atom should have desire [that is framed as ELECTRON AFFINITY] for electrons to be attached to form molecule
A hydrogen bond can form between a hydrogen atom of one molecule and which atom of another molecule?
since hydrogen atom has no electron in its shell, it acquires positive charge. when a negatively charged atom comes in contact with hydrogen atom, it donates h atom a electron to make a covalent bond. but when it breaks the negative atom restores its electron.
What is the largest atom molecule cell electron?
Cell.
What is the energy needed to remove an electron from a negative ion to form a neutral atom or molecule?
The energy needed to remove an electron from a negative ion to form a neutral atom or molecule is called the electron affinity. It represents the energy change when an electron is added to a neutral atom or molecule to form a negative ion. The higher the electron affinity, the greater the energy needed to remove an electron.
Why are ions made?
Ions are made for clothes can not be wrinkly An ion is formed when an atom [or molecule] gains or loses one or more electrons. If an atom or molecule gains an electron it acquires negative charge. If the atom or molecule loses an electron it becomes positively charged.
What type of bond is present between the atoms of a water molecule?
Covalent bonds. (Atom bindings that share electron pairs)
The addition of an electron to an atom or molecule is called?
Reduction = addition of electrons. Generally negatively charged species is formed as a result
Which is bigger atom electron molecule or cell?
A cell is larger than a molecule, which is larger than an atom or an electron. Cells are the basic structural and functional unit of living organisms, while molecules are made up of atoms, and atoms are composed of even smaller particles such as electrons.
The covalent bond between a hydrogen atom and the oxygen atom in water is formed when?
The covalent bond between a hydrogen atom and and an oxygen atom when the two atoms share electrons. They form a water molecule when there are two hydrogen atoms sharing electrons with one oxygen atom.
How many electron pairs are being shared between the hydrogen atoms and the bonded oxygen?
There are two electron pairs being shared between the hydrogen atoms and the bonded oxygen in a water molecule. The oxygen atom forms a single covalent bond with each hydrogen atom by sharing one electron pair with each hydrogen atom.
Is an electron bigger then an atom?
No. An electron as a particle is small however the probability cloud of an electron can be large- most of the volume of an atom consists of the electron cloud. In relation to this the nucleus, although it contains nearly all of the mass of the atom, is quite small.
