How do you determine number of subatomic particles for a element?
Number of protons = Number of electrons = Atomic number
Number of neutrons = Mass number - Number of protons
The atoms of one element are similar to the atoms of a different element in that they all contain the subatomic particles protons, neutrons, and electrons. The exception is hydrogen-1 which has no neutrons. The atoms of one element are different from the atoms of another element according to the numbers of subatomic particles, in particular the protons. The number of protons, the atomic number, identifies an element.
What is the subatomic particle and the calculation derived from it that is not found in the periodic table?
Atoms are composed of the subatomic particles electrons, protons, and neutrons. Elements are composed of one kind of atom. The identity of an element is determined by the number of protons in the nuclei of its atoms, which is called its atomic number. All atoms of the same element have the same number of protons.
The atom is the smallest part of matter that represents a particular element. For quite a while, the atom was thought to be the smallest part of matter that could exist. But in the latter part of the 19th century and early part of the 20th, scientists discovered that atoms are composed of certain subatomic particles and that, no matter what the element, the same subatomic particles make up the atom. The number of the…
Count protons. The proton count determines which element you have. Always. Atomic number is the number of protons in the nucleus of an atom, and hydrogen is 1, helium is 2, lithium is 3, and so on. The neutron count can vary and will result in different isotopes of a given element. But the elemental identity of a given atom is based on the number of protons in the nucleus.
The atomic mass number of an element is determined by mass of the nucleus of an atom. Therefore the particles that make up the nucleus determine the mass number. These particles are protons and neutrons. The mass of the protons and neutrons do not vary between elements, but the number of each in the nucleus varies between elements and between isotopes of the same element.