Usually only one. However, some such as chlorine gas are amixture of isotopes and thus in certain cases there can be more than 1.
Some elements have isotopes - atoms with a different number of neutrons.
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There are no "atoms in an element," but rather atoms OF an element. If you are trying to find the number of atoms in a sample of a pure element you divide its weight by its molar mass and then multiply by 6.022 x 10^23 to get the answer in atoms. The answer options are 2,3, or 4.
A pure element contains one sort of atoms, and all the elements have the same number of protons (which define the element). But the atoms can have different masses, so called "isotopes" (see link). Thus, chemically there is only one kind of atoms in a pure element, but there can be several physically different kinds of nuclei in a pure element.
It varies. Every different element (ie every different substance) has a different number of protons in its atoms. eg Hydrogen atoms have one proton, Helium atoms have two protons, Lithium has three and so on up to 92 in nature.
Gold is the element gold no matter how many atoms of it you have.
Every element has a different number of protons.
An atom is the smallest unit of an element, so every atom corresponds to a specific element, such as hydrogen or oxygen. However, an element is defined by its unique number of protons and can exist as a collection of atoms, such as in a molecule or solid form. Therefore, while an atom is always an element, an element can consist of many atoms.
This question is misguided. Atoms do not have isotopes. In a sample of an element there are many atoms. They will all have the same number of protons in their nuclei, that's what makes them the same element. Individual atoms may have different numbers of neutrons, if this happens they are called isotopes. For instance in silver, all the atoms have 47 protons, but some of them have 60 neutrons and some have 62. We say that silver has two stable isotopes. Perhaps your question should be 'Do all atoms of the same element have the same number of neutrons?'
All of the atoms of a particular element have the same number of protons. But the number of neutrons can differ by a few. Atoms with different numbers of neutrons are the different "isotopes" of the element. All the atoms behave the same way in chemical reactions, because they are the same element. In order to separate out the various isotopes, you have to use something like a centrifuge to sort them out by mass.
No. An element is made up of only one type of atom. Water and oil are made up of many different types of atoms, so they do not form an element.
Atoms can have different numbers of neutrons, which results in isotopes of the same element. Isotopes of an element have the same number of protons, but different numbers of neutrons. This leads to variations in atomic mass and overall properties.