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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 is the atomic number and atomic mass of iodine?
The atomic number of iodine (I) is 53.
The atomic weight of I is 126.90 grams per mole.
Iodine is a diatomic molecule, I2.
See the Web Links to the left of this answer for a periodic table with more information about this element!
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The atomic mass of an atom is 46 and it has 22 neutrons. How many electrons does it have?
That answer is incorrect. If the atom has 22 neutrons, then it must have 24 protons to make up the total mass of 46. A neutral atom always has the same number of electrons as protons so the correct answer is 24.
How relative atomic mass of an atom can be determined?
The relative atomic mass of an atom can be determined by averaging the masses of its isotopes based on their abundance in nature. This value is reported relative to the mass of a carbon-12 atom, which has been assigned a relative atomic mass of exactly 12.ø
The main reason the mass of an atom is expressed in atomic mass units rather than in grams is that the mass of an individual atom is extremely small, typically in the range of 10^-23 grams. Using grams would result in cumbersome decimal numbers, while atomic mass units simplify calculations and comparisons of atomic mass.
The atomic mass number of an atom equals the sum of the numbers of neutrons and of protons; in this instance, 27 + 22 = 49.
Which element has an atomic mass of 83.3?
The closest one is krypton, which has a mass of 83.80 according to the periodic table in my Handbook of Chemistry and Physics.
What is an element with an atomic mass of 47.9?
Titanium (Ti) has an atomic mass of approximately 47.9. It is a transition metal known for its strength and corrosion resistance, commonly used in aerospace and industrial applications.
How many neutral atoms does atomic number 117 and atomic mass of 294 have?
An atom's atomic number corresponds to the number of protons in its nucleus, so an element with an atomic number of 117 has 117 protons. Since the atomic mass is 294, which accounts for the total number of protons and neutrons in the nucleus, we can subtract the atomic number from the atomic mass to find the number of neutrons: 294 (atomic mass) - 117 (atomic number) = 177 neutrons. Therefore, an atom of element 117 with an atomic mass of 294 would have 117 protons and 177 neutrons, resulting in 117 neutral atoms.
Which element have an atomic mass between 15 and19?
Phosphorus (P) - 15, Sodium (S) - 16, Chlorine (Cl) - 17, Argon (Ar) - 18 and Potassium (K) - 19.
What is the atomic number and atomic mass for clhorine?
The atomic number of chlorine is 17, which means it has 17 protons in its nucleus. The atomic mass of chlorine is approximately 35.5 atomic mass units, taking into account the average of its isotopes.
What is atomic mass of benzene?
The atomic mass of benzene, C6H6, is approximately 78.11 g/mol. This is calculated by adding the atomic masses of the six carbon atoms (12.01 g/mol each) and six hydrogen atoms (1.01 g/mol each) that make up the molecule.
Statement C is not true. One mole of krypton atoms has a mass of approximately 83.798 g, not 41.90 g.
What is chlorine gases number of atomic mass?
Chlorine gas is Cl2.
Cl's atomic mass is 35.45
and that x 2 is 70.9
What 2 particles make up most of the atomic mass?
Although not all, per se, the proton and neutron in the nucleus of the atom comprise the vast majority of the mass of an atom. The electron, though not massless, contributes a practically negligible mass to the atom by comparison.
The heaviest particle is the neutron. If we assign it a mass of 1.0 mass unit, then the proton is next with a mass of 0.9986 mass units, followed by the lowly electron with a mere 0.0005 mass units.
How are the elements arranged in the periodic table by atomic mass or atomic number?
The elements in the periodic table are arranged by atomic number, which represents the number of protons in an atom's nucleus. This arrangement creates groups and periods that help categorize elements based on their properties and characteristics. Additionally, elements with similar properties are placed in columns called groups.
What is the atomic mass of a atom that has 6 neutron 6 protons and 6 electron?
Number of protons = atomic number = 6 atomic units
Number of protons + neutrons = mass number = 13 atomic units
What is the atomic number and atomic mass for hydrogen?
Each isotope of each element has an atomic mass number. The atomic mass numbers for hydrogen are 1, 2 and 3. That's because hydrogen has three isotopes. "Regular" hydrogen has a single proton in its nucleus. It's atomic mass is 1. There is also heavy hydrogen, which has a neutron bound to the proton in its nucleus. It's atomic mass is 2. Heavy heavy hydrogen has two neutrons bound together with the proton. It's atomic mass is 3. A link is provided to the Wikipedia article on hydrogen.
