0
Atomic Mass
Atomic mass is the mass of protons, neutrons, and electrons in a single specific atom.
1,752 Questions
The average atomic mass of Y would be 60.0 a.m.u.
What is the atomic mass number of the curium?
The atomic number if curium (Cm) is 96 and its approximate atomic mass is (247).
The () denotes that the exact mass is not confirmed, as curium is radioactive and unstable. So it is not easy to calculate the exact mass of all its isotopes.
What is the differences between mass and element?
Particle is piecewise, particle may come in many size and many mass content. Mass is measuring of matter using scale (kg or Pound or whatever). Mass can be count as fraction but particle always integer.
What is the atomic mass of an ion that contains 87 protons 136 neutrons and 86 electrons?
This is the ion of the isotope Pb-208 (Pb2+).
What is the mass of 25ml of oil?
You need to know the density of the oil, as there are so many different ones. Mass is given by multiplying density by volume.
Atomic mass of an element equals?
the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
How do you figure out the atomic mass number of an element?
To determine the mass number of a particular isotope of an element, you need to know the number of protons, which is the atomic number of the element, and the number of neutrons. The sum of protons and neutrons is the mass number.
What information does the atomic mass of an elemt provide?
the number of protons and neutrons in an atom.
Atomic mass is found by adding together the individual masses of the numbers of protons, neutrons, and electrons in the atom. --> Atomic Mass = protons + neutrons
How many electrons are contained in 1C?
To find the number of electrons in a charge, you divide the charge by the charge of a single election. In this case it would be:
-1C/(-1.6x1o^-19)=6.25x10^18
So 6.25x10^18 electrons are necessary to produce a charge of 1 C
What change is atomic number occurs when a nucleus emits an alpha particle?
An alpha particle is composed of two protons and two neutrons, so when an atom loses an alpha particle, its mass number decreases by four. However, since the atom loses two protons, it is now a different element. It is now the element with an atomic number minus the two protons.
Why does the atomic mass only add protons and neutrons?
The mass of an electron is very, very small compared to the mass of a proton and a neutron. The mass of the proton and the neutron are almost exactly the same. Thus, the mass of an entire atom is essential just the mass of the proton plus the mass of the neutron.
What two particles make up the atomic mass?
The atomic mass is made up of protons and neutrons in the nucleus of an atom. Protons have a positive charge, while neutrons have no charge. Electrons, which have a negative charge, are not included in the atomic mass as they are much lighter than protons and neutrons.
Why are there variations in atomic mass?
The isotopic composition of natural uranium is not absolutely identical in all ore samples; this is valid also and for other elements. The long geological evolution can influence the isotopic composition.
What is relative atomic mass and how it is related with gram?
when atomic mass of an element expressed in gram atom is called gram atom mass . and formula is
number of gram atom=given mass (in gram) by atomic mass ( in gram )
How do you calculate the atomic mass of carbon?
The same way you calculate the atomic mass of other elements.
If an atom has a number of 25 and an atomic mass of 55?
It is an atom of the element manganese (symbol - Mn).
The atomic mass of oxygen is approximately 16.00 atomic mass units (amu). This value represents the average mass of an oxygen atom, taking into account its different isotopes and their natural abundance.
What element has the atomic mass of 32.065?
Sulfur is a non meta element. Atomic mass of it is 32.065.
What two things do you add together to get the atomic mass of an atom?
The atomic weight (not mass) of a chemical element is the ratio between the average mass of the atoms of this element to 1/12 from the atomic mass of carbon-12.
The atomic mass is a term applied only to specific isotopes; the unit is the same as above. Is a value denoting the total mass of all the protons, neutrons, and electrons in an isotope.
The mass number tells us the number (the sum) of protons and neutrons in the nucleus of an atom.
The atomic number, on the other hand, tells us how many protons are in the nucleus of an atom.
IUPAC publish periodically tables of atomic weights - the last edition is from 2009-2010.
For the atomic masses of isotopes the last published edition is The AME 2003 atomic mass evaluation, edited by Audi, Wapstra and Thibault.
What equals atomic mass minus protons?
Roughly, the number of neutrons. Note that the atomic mass is only approximately equal to the number of protons plus the number of neutrons - there is a relatively small discrepancy, due to the binding energy.
The mass of 1 cup can vary depending on what substance you are measuring. As a general guideline, 1 cup of water is approximately 240 grams or 8.45 ounces. However, for other ingredients, the mass of 1 cup can be different.
What is radiums atomic mass number?
Radium is a non metal radiop active element. Atomic mass of it is 12.
