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helium yo

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Q: What element has the atomic number of 2 and the mass number of 5?
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Related questions

What is the number of neutrons for a specific element equal to?

The average number of neutrons that a specific element has is equivilent to the element's atomic mass minus the that elements atomic number. For example Helium has 2 neutrons because its atomic mass (4) minus the atomic number (2) is 2.


4.002 is the atomic mass of which element?

We can find helium as a non metal element. Atomic number of it is 2.


If an element has a mass number of 4 and an atomic number of 2 how many neutrons does the element have?

2


What is the atomic number and mass of helium?

Helium is a metal element. Atomic number of it is 2.


What is the atomic mass number of hydrogen -3?

Hydrogen is a non meta element. Atomic mass of it is 2.


What is the atomic number and atomic mass number of the element that is formed in the following nuclear reaction that takes place in the sun?

The atomic number is 2, and the atomic mass is 4 (helium)


Draw atom with mass number 4 and atomic number 2?

Helium is a non metal element. Atomic mass number of it is 4.


2 He 4.00260 what do they mean?

2 He 4.00260 has several components. The first number, 2, is the atomic number of the element. This equates to the number of protons in the element. The second component is He, which is the atomic symbol of the element. Finally, 4.00260 is the atomic mass of the element. In this case, the element described is helium.


Is the atomic mass equal to the molar mass?

1. The molecular mass of a compound is the sum oh the atomic weights of the elements contained in the molecule of this compound. 2. The atomic number of an element is the number of this element in the Periodic Table of Mendeleev; the atomic number is equal to number of protons and electrons.


What is the mass number if hydrogen-2?

Hydrogen is a non metal element. Atomic mass of it is 1.


What is a atomic number in a element?

The atomic number of an element refers to the number of protons in the nucleus of the atom of that element, and is unique to each element. The atomic weight is the weight of an atom of the element compared with the weight of a single proton, and consists of number of protons and neutrons in the nucleus of the atom of that element, and different atoms of the same element can have different numbers of neutrons, and therefore more than one atomic weight: it is usually given as an average. the atomic number on an element is simply the number of protons and electrons in the element. however, it is not the total number of them.


What are the atomic numbers and mass numbers of the stable and radioactive forms?

1. The atomic number is equivalent to the number of protons in the atomic nucleus of a chemical element. The number of protons is identical for all the isotopes of an element. 2. The mass number is the sum of protons and neutrons in the atomic nucleus of an isotope.