0
Atomic Mass
Atomic mass is the mass of protons, neutrons, and electrons in a single specific atom.
1,752 Questions
What element that has an atomic mass of 14.007?
Nitrogen, element 7, has an atomic mass of 14.0067, rounded to 14.007.
What is the atomic mass of 25mg?
The atomic mass of a substance is the mass of one mole of that substance. To calculate the atomic mass of 25 mg of a specific element, you would first need to determine the molar mass of that element. You can then use the molar mass to convert the mass of the sample (25 mg) to the number of moles, and then calculate the atomic mass of that amount.
Do you need atomic number to find atomic mass?
No, you do not need the atomic number to find the atomic mass of an element. The atomic mass is the weighted average of the masses of the isotopes of an element, whereas the atomic number is the number of protons in the nucleus.
The atomic mass of an atom is the?
The atomic mass of an atom is the mass of 6.011 X 10^23 atoms of that element.
The U.S. atomic clock is the NIST-F1, it began to be used in 1999 and wont lose or gain a second in 20 million years. It is a fountain atomic clock that is made of a 3-foot vertical tube inside a taller structure. It uses lasers to cool cesium atoms, forming a ball of atoms that lasers then toss into the air, creating a fountain effect. This allows the atoms to be observed for a lot longer than could be done with any previous method.
An atomic mass unit is equal to?
One-twelfth the mass of a carbon-12 atom or 1,660538921(73)×10−27 kg.
What is an element's atomic mass not listed as a whole number on the periodic table?
Few elements have isotopes. their atomic mass is not a whole number.
What does the atomic mass of an atom tells you?
- It tells you what number it is on the periodic table of elements.
- The number of protons in the nucleus (centre of the atom)
- And the number of elecrons orbiting around the atom
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.
What is the atomic mass number of bohrium?
The mass number of the isotope with the longest half life, Bh-270, is 270.
What best represents the mass of 1 molecule of SH2?
S is 32.066g/mol and H2 is 2.0158, giving 34.0818. This divided by avagadros number of 6.022x1023 is 5.65954832281634x10-23g (keep in mind there is inaccuracy in any figures past 3 decimal places as I only have sulphur and avagadro's number to 3 decimal places)
What is the difference between mass no and atomic no of an atom gives the number of?
Atomic number is the number of protons in the nucleus of an atom.
The mass number however is the sum of the protons and neutrons in the nucleus of an atom.
Each element has one specific atomic number (= no. of protons), but can have more different number of neutrons, hence it might have different mass numbers, those atoms are called 'isotopes' of an element.
Examples are given below
Calcium:
Ca(40) has 20 protons and 20 neutrons (mass no. 40)
Ca(41) has 20 protons and 21 neutrons (mass no. 41)
Kalium:
K(40) has 19 protons and 21 neutrons (mass no. 40)
K(41) has 19 protons and 22 neutrons (mass no. 41)
What is the atomic mass and symbol of an element with 34protons 33 neutrons 34 electrons?
The 34 protons means that this is the element that has an atomic number of 34, which is selenium. The mass number for the isotope given is 67, which is the sum of the protons and neutrons. Mass number is not the same as atomic mass. Atomic mass is the total mass of the protons, neutrons, and electrons in an atom.
How can the atomic mass change?
Depends, what do you mean "change"? Atomic mass "changes" whenever something undergoes decay or breaks apart. In this respect, atomic mass is not exactly conserved either. Rest mass gets converted to energy; e=mc^2, meaning energy is equal to mass times the speed of light squared. This energy is usually the kinetic energy of the particle that gets dislocated from the original atom.
