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Atomic Mass
Atomic mass is the mass of protons, neutrons, and electrons in a single specific atom.
1,752 Questions
What does it means when Average atomic mass is in parentheses?
For elements with no stable isotopes, the mass number of the isotope with the longest half-life is in parentheses.
What is the atomic mass of magnets?
Magnets can be made from many different metals so there is no specific atomic mass.
What is the standard unit of mass?
The standard International System of Units (SI) unit of mass is the kilogram (kg).
What is the the atomic mass of plutonium?
Plutonium's atomic mass is 244,064 204 (5) because the only naturally occurring isotope is 244Pu. Interestingly, we manufacture or synthesize a much more of other isotopes.
The atomic mass of the most important isotope of plutonium (239Pu) is:
239,052 1634 (20).
The atomic number of plutonium is 94. For the mass of other isotopes see the link below.
Atomic masses are from the tables of Audi, Wapstra and Thibault (AME 2003).
Why does plutonium have a less mass than uranium?
The atomic mass of the most common isotope of plutonium (Pu-234) is higher than the masses of the uranium natural isotopes.
Experiment to determine the relative atomic mass of Lithium?
Lithium (Li) has the molecular formula weight of 6.94 grams per mole. Theoretically this would be the weight calculated by taking it in gas form at the Standard Temperature and Pressure of 273 degrees Kelvin and 1 atm, and a system volume of 22.4 liters.
The Atomic number of Carbon is 6. The Atomic mass of Carbon depends on the isotope and may be from 8 to 22. Carbon 12 and Carbon 13 are the only stable isotopes of Carbon. Carbon 14 is the longest-lived unstable (radioactive) isotope. Only Carbon 12, 13 and 14 are found in nature.
In science the basic unit is the atom which is composed of neutrons, protons, and electrons. Electrons are generally considered to small to count as part of the mass. Atomic mass is the sum of neutrons and protons. For example: Oxygen has 6 protons and, in its natural state, 6 neutrons. This means that its atomic mass is 12.
What is Berylium's Atomic mass?
Atomic mass is roughly the amount of protons and neutrons in an element. Berylium has 4 protons and 5 neutrons giving it an atomic mass of about 9. (9.012182 amu)
The isotope with a mass of 32 amu is the most abundant. This can be determined by comparing the atomic mass of sulfur (32.06 amu) to the masses of the isotopes. Since the atomic mass is closest to 32 amu, this isotope is the most abundant.
What is the difference between atomic weight and atomic mass and molar mass and molecular weight?
The atomic mass is the mass of an atom at rest. This refers to one atom, and is typically measured in so-called atomic mass units, and describes a single isotope of that element. The atomic weight is the abundance-weighted average mass of an element (an average mass of all the isotopes that exist for that element, weighted by how abundant each isotope is in nature). Atomic weight is commonly reported in atomic mass units, as well as in grams per mole. The molar mass is the mass of one mole of something, and can refer to both a single element as well as molecules and other compounds. The molecular weight is essentially the same thing as the molar mass except that, as the name implies, it refers to molecules rather than just elements. The molar mass and molecular weight is typically given in units of grams per mole.
The molecular weight of a compound is found by adding the atomic weights of all of the atoms in the compound. Water, for example, has a molecular weight of 18.0152 grams/mole, as there are two hydrogen atoms that each have an atomic weight of 1.00079 g/mole and one oxygen atom with an atomic weight 15.9994 grams/mole.
The atomic mass is the mass of a molecule, atomic particle or sub-atomic particle.
Where should be the atomic number?
The atomic number is equal to the number of protons in the atomic nucleus of a chemical element.
What's the difference between an atomic number in the mass number of an Atom?
All the atoms of a particular element have the same atomic number (number of protons). The atoms of different elements have different numbers of protons. For example, all oxygen atoms have 8 protons and all sodium atoms have 11 protons. The mass number of an atom is the total number of protons and neutrons it contains.
Which element has an atomic mass of 31?
The atomic mass of Phosphorus is 30.9738. However, Gallium has an atomic number of 31.
What is lanthanum atomic mass?
Im not sure about the atomic mass bit but Lanthanum is a silvery white, malleable, ductile, and soft rare-earth metal xx
It would be actinium with 89 protons and a mass of 230.
How does the atomic mass change when a proton is added to its nucleus?
Since the atomic mass consists of protons and neutrons, adding a proton would add one unit to the atomic massguessing that the number of neutrons doesn't change.
Which best describes the definition of the atomic mass of an element?
it is the weighted average of the masses of an element's isotopes.
What is ekasilicon atomic mass?
The atomic mass of ekasilicon is 293.21 grams per mole. It contains 14 silicon atoms and 2 germanium atoms in its molecular structure.
