How is an isotope different from the standard form of a chemical element?
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Ответ:
Explanation:
A chemical element is a pure substance formed by atoms with the same atomic number (number of protons). This is because it is the number of protons what identifies an element.
For example: oxygen is a chemical element, so oxygen is formed by only atoms of oxygen, and the atomic number of those atoms is 8, because every oxygen atom has 8 protons.
Nevertheless, some atoms of oxygen, may have different number of neutrons. Isotopes are different kind of atoms of the same element, which only differ in the number of neutrons. So, some atoms of oxygen will have 8 neutrons, other 9 neutrons, and other 10 neutrons (those are the stable isotopes of oxygen).
That difference in neutrons, is generally accepted that, does not modifiy substantially the chemical properties of the element, but the mass number. So, the isotopes with more neutrons wil be heavier, and the isotopes with less neutrons will be lighter.
Mass number = number of protons + number of neutrons.In general a chemical element is formed by a mixutre of isotopes of the same element.
Ответ:
First convert 980 lbs to kg
980 • 0.454 = 444.92
Round to 445.
He gets 10mg/kg of dewormer.
445•10 = 4450 mg.