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The element that has a mass number of and two valence electrons is an isotope of calcium.

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13y ago

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What is the atomic mass the same as?

The Atomic Mass is equal to the number of protons and electrons that an element has.


What is The atomic mass of an element is equal to?

The number of protons, electrons, and neutrons:P


How do you find the mass of an element?

Mass number..can be calculated..by the sum of No. of protons and the No. of electrons. And this would give you the the mass number of the element.


Can you use the mass number of an element to determine the number of electrons in an atom?

No, the mass number of an element is the sum of protons and neutrons in the nucleus. To determine the number of electrons, you would need to know the atomic number of the element, which is equal to the number of protons. Electrons in a neutral atom equal the number of protons.


Does the mass number equal the same number of electrons?

The atomic mass number does not equal the number of electrons in the element. The atomic number, on the other hand, does usually equal the number of electrons in the element, With the exception of ions.


How many electrons and protons are in an element with an atomic?

put it in your mind! The Atomic number. is number of protons, While The Mass number. is number of protons and electrons. when you subtract both get the number of electrons and this for any element but not all elements have same atomic numbers or mass and Rutherford First discover "transmutation" from element to other element which determine by their atomic and mass numbers.


An explination of what mass number and atomic number are?

The atomic number refers to the number of protons in the element. And since the number of protons = number of electrons, the atomic number is also the number of electrons in the element. The mass number of an element refers to the number of neutrons and protons in the element. &since electrons are negligible in mass, the number of neutrons can be found out by subtracting the atomic number from the mass number. Take for example, oxygen. Oxygen has an atomic number of 8 and a mass number of 16. Hence, from the atomic number it can be derived that it has: 8 electrons 8 protons While from the mass number, it can be derive that it has: 16-8 = 8 neutrons


How many electrons if element has mass number of fourteen?

seven


How do you tell the number of neutrons in an element?

Subtract the atom number from the mass number to get the neutron. Mass number is the sum of neutrons and electrons. Atom number is the number of electrons. the number of electrons is equivalent to the number of protons.


Can the mass number of an element be used to determine the number of electrons in an atom?

No, the mass number of an element represents the total number of protons and neutrons in the nucleus, but it does not provide information about the number of electrons. The number of electrons in a neutral atom is equal to the number of protons in the nucleus.


How many electrons does and atom of tin have if its mass number is 118 and atomic number of 50?

Regardless of the mass number, a neutral element atom has electrons which is similar in number to the atomic number. Hence, an atom of the given element contains 50 electrons. Further, by considering the mass number, it can be concluded that there are 68 neutrons as the mass number is similar to the sum of protons and neutrons number of protons is equivalent to number of electrons.


How are atomic mass and atomic number different?

Atomic number is the number of protons in the nuclei of the atoms of an element. Atomic number is unique to each element. Atomic Mass is the combined mass of the protons, neutrons, and electrons in an atom of an element.