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Why is the atomic mass of an element not a whole number while the atomic number is?
The atomic number refers to the number of protons in the atom. Since the proton cannot be an in-between number, the atomic number will have to be a whole number. On the other hand, the atomic mass does not have to be a whole number because it is the mass of an atom and is roughly equivalent to the number of protons plus the average number of neutrons in that particular element.
What is the mass number of an atom equal to?
The mass number of an atom is equal to the number of protons and neutrons that are in the nucleus of the atom. Atoms are the basic units of a chemical element.
Why is the atomic mass of an element not usually given as a whole number even though each individual atom of the element has a whole number of protons and neutrons?
It's because of electrons, they have a relative mass of 1/1836
The mass number of an element is equal to what of an element?
The sum of the number of protons and the number of nuetrons.
What is the mass number of the atom Mercury?
Mercury is a metal element. Mass number of it is 200.
Why is the atomic mass of an element usually not given as a whole number even though each individual atom of the element has a whole number of protons and neutrons?
It's the electrons that throw it off.
Distinguish between the atomic number and mass number of an element?
The atomic number of an element is the number of protons in the nucleus of each atom of the element. Mass number is a property of a particular isotope of the element rather than of the element itself: The mass number is the sum of the numbers of protons and neutrons in the nucleus of each atom of the isotope.
How do you figure the number of neutron's in an atom?
Take the Atomic Mass and round it to the nearest whole number. Then subtract this number and the atomic number of that element.
The mass number for an atom of an element when stated with the element's symbol indicates that you have an?
The mass number for an atom of an element, when stated with the element's symbol, provides the total number of protons and neutrons in the nucleus of that atom.
The number of protons in an atom of an element determines the atom's what?
Mass Number
What is a mass number atomic mass number?
The atomic number is the number of protons in an atom. This number is fixed and determines what element that atom is. The Atomic Mass is the mass of an atom and is roughly equivalent to the number of protons plus the average number of neutrons that atoms of that particular element.
When determining the mass of an atom the electrons are not considered can scientists disregard the electrons?
Usually they are measuring just the necleus of the atom since it would be a whole number. This is called finding the Mass number. The atomic weight is the whole atom together, which is a whole lot of decimals. So they take the atomic weight and round it to a whole number for the mass number. For example, Boron (an element on the table) has an atomic weight of 10.811. But scientists round the number upward to 11 to be the Mass number.
