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It is an isotope, an example is hydrogen and deuterium.

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Q: What is a form of a element that has the same atomic number but a different mass number?
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Why is an atomic form of an element called when it contains the same number or protons but different number of neutrons?

istope


Form of an element having different atomic and number of neutrons?

Isotopes have different numbers of electrons, but not different atomic numbers (numbers of protons) or they'd be different elements.


What form the atomic number of an element represent?

Atomic number = number of a chemical element in the periodic table of Mendeleev = number of protons in the nucleus = number of electrons in the atom


Form a atomic number of 15 atoms?

Atomic number is the number of protons in an atom, not the number of atoms. The element with the atomic number 15 is phosphorus.


What is the relationship between mass number and atomic mass of an element?

Each isotope of an element has an atomic mass. The average of all the atomic masses of an element's isotopes gives an elements atomic weight. For this reason, atomic weights are decimal numbers.


Is it true that the element's mass number determines how the compound will form?

No. The element's atomic number determines how it forms compounds.


What is the atomic number of agate?

Agate is not an element, so it has no specific atomic number. Agate is a specialized crystalline form of silicon.


What does the atomic numbers of an element represent?

The atomic number is the number of protons found in the nucleus of an atom.Also, if in it's pure elemental form, the number of electrons.


How the elements of isotopes are alike and how they are different?

Elements can exist in the form of different isotopes. Isotopes of the same element have the same number of protons in their nuclei but have different numbers of neutrons. The first gives them the same atomic number and chemical properties while the second gives them different atomic weights.


Is it possible for an atom to have more than one atomic formula?

An element can have a number of isotopes with different atomic mass but will always have the same atomic number. Some elements can also form two or more allotropes that can have different molecular formulas, for example oxygen can be O2 or O3.


What does an atomic number of an element represent?

The atomic number represents the number of protons in the nucleusNumber of protons in nucleus.Number of electrons in the clouds around the nucleus (when not ionized).


What two things does the atomic mass represent?

Atomic mass is the sum of the number of protons and neutrons in the nucleus. The reason it is typically found in decimal form is because it is using the average number of neutrons, from all the different isotopes of that element.