There are 3 types of particles in an atom: neutrons, protons, and electrons.
Atoms comprise three parts. These parts are extremely tiny particles known as protons, neutrons, and electrons. Electrons have a negative charge, and they are smaller and more numerous than the others. They exist in orbiting “shells” around the nucleus. Protons are positively charged, and contained in the nucleus of the atom. Neutrons are neutrally-charged.
An atom is made up from proton, neutron and electron. Depending on the amount of each, gives specific properties to the atom. Electrons are the elements that can bind atoms together forming them into molecules. Electron also has a negative charge to it, while protons are positive and neutrons, like the name says it, are neutral.
Atoms are classified by their mass, which is given by the amount of electrons, neutrons and protons they have. The word atom comes from Greek language, meaning a part or particle considered to be irreducible.
A not-always-obvious question about the parts of an atom is: How do the protons stay in the nucleus of an atom? Naturally, they should all repel each other since they have positive charge, and on top of that a neutron does not have any charge to hold it in place! Yet atoms don’t explode, so what gives? Particle physicists think there are even tinier particles in between neutrons and protons called “gluons”, which hold the nucleus of the atom together like glue (etym.: glue + atomic suffix). A gluon is a type of quark, which is a sub-atomic particle.
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