An isotope is an atom that contains a different number of neutrons. In order for an element to change there has to be a different number of protons.
Atom
The number of protons in an atom's nucleus determines its chemical identity.
A molecule is the smallest part of a compound that still retains the properties of said compound. As the atom is the smallest particle of an element into which it can be divided and still retain all the properties of that element, the molecule is the atom's analog for a compound.
An atom is the smallest part of matter with a chemical identity, impossible to be broken by chemical procedures.
The number of protons in the nucleus of an atom will determine its chemical identity. Only that. The number of neutrons can vary a bit, depending on the element, and we call these variations isotopes of that element. Electron count will match proton count only in a neutral atom. Rememeber that atoms loan out and borrow electrons, which is what chemistry is all about.
retains the chemical identity of that element.
A molecule is the smallest unit of a pure substance that can exist and still retain its chemical properties. An atom is the smallest unit of an element that can exist and still retain its chemical properties.
the smallest particle of an element that maintains its chemical identity through all chemical and physical changes is called an atom
Protons determine which element an atom is.
An atom is the smallest particle of an element that can be uniquely identified as that specific element.Note that this question is different from asking "What is the smallest particle in an atom?" (see related question below). Atoms are composed of smaller particles (protons, electrons, and neutrons), but the smallest thing that has the identity of a specific element is the atom.The smallest particle of an element that still retains all that element's properties is called an ATOM.
The number of protons in an atom's nucleus determines its chemical identity.
The smallest subdivision that retains all of the properties of a molecular compound is a molecule, and the smallest subdivision that retains all of the properties of a ionic compound is a formula unit.
An atom is the smallest part of matter with a chemical identity, impossible to be broken by chemical procedures.
A molecule is the smallest part of a compound that still retains the properties of said compound. As the atom is the smallest particle of an element into which it can be divided and still retain all the properties of that element, the molecule is the atom's analog for a compound.
The number of protons in the nucleus of an atom will determine its chemical identity. Only that. The number of neutrons can vary a bit, depending on the element, and we call these variations isotopes of that element. Electron count will match proton count only in a neutral atom. Rememeber that atoms loan out and borrow electrons, which is what chemistry is all about.
an atom is the basic unit of a chemical element.
retains the chemical identity of that element.
The number of protons in the nucleus affects the elemental identity of an atom, whereas the number of neutrons does not affect which element an atom belongs to.