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Yes, free electrons can collide with atoms.
When a photon of energy falls on an electron bound inside an atom, the electron absorbs the energy and is emitted from the atom.
Atoms which form covalent bonds do share electrons. An example would be the atoms in a water molecule. Yes, the electrons are really shared.
electrons are part of atoms.
Atoms share electrons when they form covalent bonds.
Electrons; valence electrons are on the outermost level
Protons are smaller than atoms. Protons are subatomic particles that are found within the nucleus of an atom along with neutrons. Atoms are made up of protons, neutrons, and electrons.
Atoms within the molecules bond with one another through a process of sharing electrons.
In respect to different elements, no they don't, in respect to like atoms of one particular element, yes they do. The electrons are the particles that vary from like atoms of the same element. When the electrons and protons are uneven within an atom, you have a radioactive element.
Electrons are smaller than atoms. There are electrons in atoms, but no atoms in electrons.
All atoms are neutral because the positive and negative charges within the atom are equal. The number of protons (+) and the number of electrons (-) are the same. Ions are atoms with a positive or negative charge. A cation is a positively charged atom with less electrons than protons. An anion is a negatively charged atom with more electrons than protons.
Metallic bonds are formed within metal atoms. It can be as nuclei in a pool of electrons. These free electrons are responsible for the electricity and heat conducting.
A lone oxygen atom has 6 electrons in its outer shell which is not very stable, whereas as full octet (8 outer shell electrons) is stable. In order to achieve this two oxygen atoms will share 4 electrons, each contributing 2 electrons. Since these electrons exist within the orbitals of both atoms, to oxygen atoms essentially achieve a full octet.
The proton number within the nucleus remains the same.
For bonding between atoms we usually show the dot-cross diagram representing the outer most electrons of bonded atoms.
yes, some atoms don't actually have electrons.