The elements are identified by atomic number. The atomic number is equal to the number of protons in each atom of the element.
Of course the elements are usually identified their symbols, which are arbitrary.
A particular element can be identified by its physical characteristics. For instance, most metals are usually shinny. Some laboratory tests can also be performed to identify some elements.
by it's number of protons.
Protons
protons
The masses of any two atoms of the same element are not always the same. Atomic mass (the mass you see on the periodic table) is just a weighted average of all of the weights of all of the different isotopes of an element.
In any diatomic element it is always a covalent bond.
An element in the activity series can replace any element below it on the list. The ability of an element to react is referred to as the element's activity.
yes any type of water is an element
So-called NON-transition metals is not a defined group of elements, other than "All other elements that are NOT transition elements".
Atomic Mass
yes
Yes you can recognize it. We use atomic number for that.
Holsteins have more than one "trace element" in them. So there is no particular trace element of a particular breed of cow, or any other animal for that matter.
Logan Henderson has never identified himself as an Athiest, or of any particular religion. The true answer is "unknown".
The atomic number of an element is equal to the number of protons in the nucleus of that element; it will identify the element. The number of neutrons of a given element may be different as the element may have a number of isotopes.
The number of protons.
The term "metalloid" properly does not designate any particular element but rather a type of element that has some common properties with both metals and nonmetals. Of course, any element having this characteristic may be called a metalloid.
Logan Henderson has never identified himself as an Athiest, or of any particular religion. The true answer is "unknown".
atomic weight
The empty element is a subset of any set--the empty set is even a subset of itself. But it is not an element of every set; in particular, the empty set cannot be an element of itself because the empty set has no elements.
Which of these is always true of atoms? protons, electrons AND neutrons are always equal in number they are always bonded to another atom they always have a charge they are always neutral in elements