The atomic number is equal to the number of protons in the nucleus, and for neutral atoms, it is the same as the number of electrons. In an attempt to keep atoms and ions from getting confused with one another, it is best to think of atoms as always being electrically neutral and ions should be considered charged positively or negatively depending on whether electrons are gained or lost by an atom during the chemical combination of atoms in forming substances such as water, salt and rust found on metals. Protons in atoms and ions are always the same for a specific atom.
Every element has a unique atomic number, and so each element's identity is determined by the number of protons in its nucleus.
However, the same element can have different numbers of neutrons in its nucleus. Two atoms of the same element with two different numbers of neutrons in the nucleus are called isotopes. Also, note that if an atom is not charged (neutral), then the number of protons must equal the number of electrons, and so the atomic number is also equal to the number of electrons in a neutral atom of each element.
However, if the atom is charged (and therefore called an ion), it will have a different number of electrons orbiting it. If the number of electrons is less than the number of protons, it will be a positively charged ion, and the charge will equal the difference between the number of electrons and protons. The same is true if it has more electrons than protons, except now the charge will be negative.
Look under the Web Links below this answer for a Periodic Table. The number listed for each element is its atomic number. Also see the Related Questions links for more information about the number of protons, neutrons, and electrons in an atom.
The atomic number of an atom represents the number of protons in that atom.
The atomic number of an atom tells you the number of protons in the nucleus of the atom.
protons tells us the atomic number of that atom.
the atomic number is the number of protons/electrons in the atom
The Atomic Number
The atomic number is the number of protons in an atom's nucleus.
Tell you the number of protons and electrons in an atom
It tells you the number of protons/electrons in an atom.
The atomic number tells you how many protons and electrons are in a specific element.Atomic number tells us about protons. Number of protons that atom contains.
No. of protons in the atom.
The atomic number tells you how many protons are in an atom. This number is not equal to the number of protons or electrons. Therefore, the atomic number is the same for an ion of an element as well as the neutral atom.
Atomic number is equal to number of protons. It is also equal to number of electrons in a neutral atom.
The atomic number is equal to the number of protons.
The atomic number of an element is the number of protons in each atom of the element, whether neutral or not. If the atom is neutral, the number of electrons in the atom is the same as the number of protons.
The element's atomic number.
It describe the Number of Protons.
The atomic number tells us how many protons are in the atom and therefore the species of atom. The atomic mass tells us how many neutrons and protons are in the nucleus of the atom.
It tells you about the number of electrons in atomand thus indirectly determines the atomic no. of the atom. this is because the no. of protons and nuetrons in an atom are equal.
The atomic number of mercury will tell you this (the atomic number = number of protons (and electrons)). The atomic number of Mercury is 80.80.
The atomic number of an atom is the number of protons in the nucleus of an atom. The number of protons determines the identity of an element and its properties. Hope this helps :3
Atomic number(z) of an element is the number of protons present in an atom.z = p(protons)
Is the number of protons in an atom determines its atomic number
We use atomic number for recognize chemical elements. atomic number means, how many protons are there in a single atom.
Atomic mass minus number of protons (atomic number)
IF you know the atomic mass and the atomic number the atomic no. is the number protons and electrons(number of protons is the same as the number of electrons) and whatever the atomic mass - protons and you will get the number of neutrons