Atoms lose their neutrality when electrons are either lost or gained. Atoms that have lost or gained electrons are called ions. Neutral atoms have the same number of protons, neutrons and electrons.
Protons have a positive charge, while electrons have a negative charge. Ions are electrically charged atoms, having a negative charge if they gained an electron and a positive charge if they lost an electron. The chemical and physical properties of an atom change as ions are created. When two ions with opposite charges come into contact, they are attracted to each other. They may begin to share electrons in either covalent or electrovalent bonds.Learn More
Because ancient Greek thinkers such as Democritus lacked sophisticated technology and tools such as the microscope, his theory of the atom was due more to thought experimentation than to hard empirical observation, as used in modern science. In essence, he conceptualized it.Full Answer >
To find the valence electrons in an atom, identify what group the element is in. An element in group 1A has 1 valence electron. For example, Li is in group 1A, so that means it has one valence electron. If the element is in group 2A, then it has two valence electrons.Full Answer >
The three major subatomic particles of an atom are electrons, neutrons and protons, according to Science Daily. Protons and neutrons are made of smaller particles known as quarks. Photons, positrons and neutrinos are made after nuclear fusion occurs in stars.Full Answer >
A Bohr model of Yttrium is a representation of an atom of Yttrium. Yttrium was discovered by Johann Gadolin in 1794. It is named after a town in Sweden.Full Answer >