Atomic Mass

The element with atomic mass number 207 is lead (Pb). Lead is a heavy metal that is commonly used in batteries, construction materials, and ammunition.

Among these three elements, Cl has the greatest mass, as can be seen from any periodic table or other reference work that shows atomic masses.

The atomic mass for Ge (germanium) is approximately 72.63 grams per mole.

Magnesium has 12 protons and electrons and its electronic configuration is 2.8.2, therefor it has 2 electrons in its 3rd energy level or elcectron outer shell

In an atom of chlorine with an atomic number of 17, the number of protons in the nucleus is 17. Since the atom is neutral, it will also have 17 electrons. Neutrons can be calculated by subtracting the atomic number from the atomic mass, so for chlorine with an atomic mass of 35, it would have 35 - 17 = 18 neutrons in the nucleus.

The number of neutrons in an atom can be calculated by subtracting the atomic number (protons) from the atomic mass. In this case, for the isotope of yttrium with an atomic number of 39 and an atomic mass of 89, the number of neutrons is 50 (89 - 39 = 50).

To calculate the atomic mass of an atom, you would need to know the atomic number (number of protons) and the mass number (sum of protons and neutrons) of the atom. The atomic mass is typically a weighted average of the isotopes of that element based on their abundance.

To find the number of neutrons in an atom, you would subtract the atomic number (number of protons) from the atomic mass (sum of protons and neutrons). The difference between the atomic mass and the atomic number gives you the number of neutrons in the atom.

To calculate the relative atomic mass of an element (which is by its definition an average), you need the mass number and relative abundance of each isotope present.

Suppose we have the following data from the mass spectrometer:

first isotope mn X, abundance A%

second isotope mn Y, abundance B%

third isotope mn Z, abundance C%.

Then ram = (A/100 x X) + (B/100 x Y) + (C/100 x Z)

If there are more than 3 isotopes, just do the same for each one and add all the expressions together.

The element that has the atomic mass of 12 is carbon.

For elements the correct expression is atomic weight (not mass).

The atomic weight of carbon (after IUPAC 2009) is [12,0096; 12,0116] or as a more simple, conventional value 12,011.

The approximate mass of an oxygen atom in atomic mass units is 16. Oxygen has an atomic number of 8, which means that its atomic mass is approximately 16 atomic mass units.

False - an electron is about 1/1836 the mass of a proton.

The atomic mass of nobelium is approximately 259.1 atomic mass units.

Numbers should only ever be rounded when a number of significant figures are expressly requested. In this case you would simply leave it as 79.904. However, if you were asked to round 79.904 to two significant figures then the correct answer would be 80 to 2 s.f. Note that you must explicitly specify the significance of the trailing zero otherwise it implies an unwanted level of precision.

The average atomic mass of magnesium is approximately 24.305 amu (atomic mass units). This value is calculated based on the relative abundance of its isotopes: about 78.99% of magnesium is magnesium-24, and about 10.00% is magnesium-25.

The particle with one unit of positive charge is Proton.

Answer Proton

The atomic mass of hassium, element 108, is 277 u (unified atomic mass units).

generally each atom cosist of group of molecules ,each group of molecules are arranged by combination of morethan two chemical ,each chemical has been separated according to the weight or strgngth this is said to be called as atomi mass number.

The atomic mass of sodium is 22.990 because it is an average mass of all naturally occurring isotopes of sodium, taking into account their relative abundances. Sodium has multiple isotopes with slightly different masses, which contributes to the atomic mass being a non-integer value.

Carbon-12 (12C) is used as the standard in the relative scale for atomic masses, and its assigned atomic mass is 12 atomic mass units.

The same as for a helium nucleus: 4. Two protons and two neutrons.

The density of the nuclear mass is higher than that of the atomic mass because atoms are mostly empty space with the majority of their mass concentrated in the nucleus, which is extremely dense. The nucleus contains protons and neutrons tightly packed together, leading to a much higher density compared to the overall atomic mass spread out over the atom's volume.

an element is distinct from others by the number of protons, change the number of protons you have a different element1. The number of elections can be altered creating ions2 and the number of neutrons can be different which are isotopes. so the atomic weight can change between ions and isotopes of the same element.

1. breaking down of the nucleus called radiation.

2. cations + charge: number of protons greater then elections

anions - charge: number of elections greater then protons

The atomic mass of an element listed in the periodic table is the weighted average mass of all the isotopes of that element, taking into account their natural abundance. It is expressed in atomic mass units (amu) or grams per mole (g/mol).