The answer is "the electron."
"Valance Electron" is a more specific and correct answer.
Both protons and electrons are responsible for chemical behavior. Neutrons play a role in the stability of the nucleus so they play a role in the radioactive nature of the elements.
Protons: in the nucleus. Electrons: outside the nucleus in the cloud.
They are on the outermost level of the electron shells. On the periodic table the valience electrons increase as they go over in groups. Valence electrons are located at the highest energy level present in an atom and they are almost responsible for its chemical properties. They are the electrons that participate in chemical reactions.
Elements in the same group have similar electronic configurations. For example, all elements in Group 1 contain 1 unpaired electron located in an S orbital. It's the electronic configuration of atoms (and to a lesser degree, their size and charge) which dictate their chemical properties. Nuclear properties, on the other hand are dictated largely by the atoms size and number of protons and neutrons. Chemists, for the most part, aren't interested in these.
Elements with similar physical and chemical properties are located in a group.
...By the nnumber of electrons in the outermost energy level.
Yes, they are located in the outer layer called the shell.
They are on the outermost level of the electron shells. On the periodic table the valience electrons increase as they go over in groups. Valence electrons are located at the highest energy level present in an atom and they are almost responsible for its chemical properties. They are the electrons that participate in chemical reactions.
Elements in the same group have similar electronic configurations. For example, all elements in Group 1 contain 1 unpaired electron located in an S orbital. It's the electronic configuration of atoms (and to a lesser degree, their size and charge) which dictate their chemical properties. Nuclear properties, on the other hand are dictated largely by the atoms size and number of protons and neutrons. Chemists, for the most part, aren't interested in these.
Elements with similar physical and chemical properties are located in a group.
The electrons that participate in chemical bonds are located in the "valence shell" or outer energy level of that atom. They are known as the valence electrons, and they are the only part of the atom that participates in a chemical reaction.
...By the nnumber of electrons in the outermost energy level.
Yes, they are located in the outer layer called the shell.
The valence electrons are the electrons that undergo chemical bonding in the main group or representative elements.
Chemical bonding is occurred from the participation of valence electrons. Valence electrons are located in the topmost energy level of an atom.
electrons are always involved in chemical reactions. how they are positioned which atom they are located if they are sharing paired unpaired etc.
I'm no expert, but both germanium and silicon are located in the same group on the periodic table. Elements in the same group are chemically similar because they contain the same number of valence electrons.
In the columns of the periodic table, chemical properties are similar.
Example: if an atom has 20 protons, there should be 20 electrons to make it neutral(balanced). neutrons have no charge so they are automatically neutral. hope that helps =)