Yes, that is a characteristic of an atom.
What? Please make this clearer.
This is the Lewis dot notation.
Different periodic tables show different information about an atom's properties. On the normal periodic table you can read the atomic number, which is the value of the number of protons in the nucleus.
Chemical properties of a element is governed by ELECTRONIC CONFIGURATION of that element. As isotopes of same element have identical electronic configurations, their chemical properties are same.
The Atomic Mass is the total mass of all the sub atomic particles (i.e. the mass of the whole atom): Electrons, Neutrons and Protons. Therefore, it identifies isotopes (as they have different number of sub atomic particales - even for the same element) and thus total mass differs. There can be a fair amount of difference between the Atomic Mass of the most common isotope of an element and its Atomic Weight - which is averaged (weighted average). This makes a difference for single atom calculations, but makes little real difference in bulk calculations.
What? Please make this clearer.
Silicon.
Silicon.
The number of electrons in isotopes is identical.
I don't know. I'm asking YOU that question.
Mrs Hanger
If you want to show that A is a subset of B, you need to show that every element of A belongs to B. In other words, show that every object of A is also an object of B.
Atoms of different elements are built of different numbers of protons, neutrons and electrons. The most important property is the number of protons, or atomic number, as this defines the element. The number of electrons is equal to this. The number of neutrons can vary but should be given as it defines which isotope you have. Alternatively, you can express this information as the proton number (i.e. number of protons) and the mass number (protons + neutrons). This latter method is more usual, and the two numbers are often written in front of the element's symbol. The positioning of the numbers is important, with the mass number on top and the proton number below. The script editor won't let me show this, but you'll see it in any chemistry book.
Υou show that it is continuous in every element of it's domain.
This is the Lewis dot notation.
A chemical formula
Different periodic tables show different information about an atom's properties. On the normal periodic table you can read the atomic number, which is the value of the number of protons in the nucleus.