[DOC] [TLE] Isotopes - Boundless [PAR] Any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. ... an atom with an unstable nucleus, characterized by excess energy available that undergoes radioactive decay and creates most commonly gamma rays, alpha or beta particles. [DOC] [TLE] Atomic structure  proton, neutron, electron, isotope, atomic number ... [PAR] The number of protons in an atom is called the atomic number (sometimes called 
... Charged particles which have the same charges ( + + ) or (   ) repel each 
other. ... However atoms of the same element can have different numbers of 
neutrons ... Below are isotopes of oxygen, they all have the same number of 
protons but... [DOC] [TLE] What are atoms of the same element that have different masses ... [PAR] ... are called isotopes. Different masses result when there are different numbers 
of neutrons. ... What are atoms with the same atomic number but different atomic 
masses? ... neutrons. For example, two common isotopes of uranium are written 
as U-236 and U-238. ... A: Different forms of the same element are called 
isotopes. [DOC] [TLE] What are atoms with the same atomic number but different atomic ... [PAR] What is the difference between atoms, ions and isotopes? What are atoms of the 
same element that have different masses called? ... are the heaviest subatomic 
particles and constitute the entire atomic mass of an element. When two atoms 
have the same number of protons, they are said to be from the same element. [DOC] [TLE] How it works - Isotopes - Atoms and Elements, The nucleus and ... [PAR] The number of protons, whatever it may be, is unique to an element. ... The 
discovery of these particles, integral to the formation of isotopes, ... must have the 
same number of neutrons as it does protons and electrons: some do, but this is ... 
Such atoms are called isotopes, atoms of the same element having different 
masses. [DOC] [TLE] Atomic number, atomic mass, and isotopes | Elements and atoms ... [PAR] The atomic number is the number of protons in an atom, and isotopes have the 
same ... and they will eventually release subatomic particles to become more 
stable, giving off ... forms of an element that have the same number of protons but 
different numbers of neutrons. ... These two alternate forms of carbon are 
isotopes. [DOC] [TLE] General Chemistry Online: FAQ: Atoms, elements, and ions: What is ... [PAR] From a database of frequently asked questions from the Atoms, elements, ... 
alpha particle * ... revealed that each of these element forms had its own 
distinctive mass. ... same number of protons in their nuclei, but different numbers 
of neutrons. Isotopes have the same atomic number but different masses and 
mass numbers. [DOC] [TLE] Isotope - Wikipedia [PAR] Isotopes are variants of a particular chemical element which differ in neutron 
number. All isotopes of a given element have the same number of protons in 
each ... Each atomic number identifies a specific element, but not the isotope; an 
atom ... atom has 6 protons, so that the neutron numbers of these isotopes are 6, 
7 and 8... [DOC] [TLE] Isotope - Simple English Wikipedia, the free encyclopedia [PAR] The atoms of a chemical element can exist in different types. These are called 
isotopes. ... Because different isotopes have different numbers of neutrons, they 
do not ... Different isotopes of the same element have the same atomic number. ... 
A hydrogen atom with an extra neutron (atomic mass of 2) is called deuterium(2H
). [DOC] [TLE] Lesson 3 - Atoms and Isotopes.pptx [PAR] Parts of an atom; Isotopes; Unstable isotopes. Scientists and discoveries. 2 ... 
Electrons are the smallest of these particles. ... An element is a substance whose 
atoms all have the same number of protons. ... Atoms that contain the same 
number of protons but different numbers of neutrons ... Atoms combine to form 
molecules. [DOC] [TLE] isotopes and atomic symbols [PAR] All atoms of the same neutral element have

Question: Isotopes are 2 forms of an element with the same number of protons but different numbers of these particles
Answer: neutrons