The atomic weight of ruthenium to 3 digits after the dot is 101.065 unified Atomic Mass units.
The formula for calculating atomic weight is:
n
∑(wx*px)
x=1
where:
n is the number of isotopes you have the data for.
w is the weights of the isotopes.
p is the percent compositions of the isotopes in decimal form.
∑ is the summation symbol.
The data can be found in the provided link.
Lithium is a meta element. Atomic mass of it is 7.
The Atomic number of Neon is 10 and the Atomic weight is about 20.18g rounded off to 2 decimal places. If you don't have a periodic table you should get one most periodic tables have the atomic weight of all elements you need to know to around 2 decimals. I printed mine off Google images =)
Unified atomic mass unit
your mom is the atomic weight of a carbonate
Selenium (Se) has an atomic weight of 79,04.
101.07
The atomic number of ruthenium (Ru) is 44.The atomic weight of Ru is 101.07 grams per mole.See the Web Links to the left of this answer for a periodic table with more information about this element!
Lithium is a meta element. Atomic mass of it is 7.
Helium has atomic number 2. That means the helium atom has 2 protons and two electrons. The standard atomic weight of helium is 4.002602, or 4.003 rounded to 3 decimal places.
no they are the exact same weight the decimal on the atomic mass is the weight from the electrons
Atomic mass is the total mass of protons and neutrons in an atom, which are whole numbers. Atomic weight, on the other hand, takes into account the abundance of different isotopes of an element, which can result in a weighted average that may be a decimal number.
The Atomic number of Neon is 10 and the Atomic weight is about 20.18g rounded off to 2 decimal places. If you don't have a periodic table you should get one most periodic tables have the atomic weight of all elements you need to know to around 2 decimals. I printed mine off Google images =)
The total number of neutrons in an atom is known as its atomic mass. The sum of all the atomic weights of isotopes of a particular element is known as an element's atomic weight. Atomic weights are decimal numbers for this reason.
Atomic weight = Weight of protons + Weight of neutrons
Unified atomic mass unit
Atomic Number = 6. Atomic Weight = 12.011
your mom is the atomic weight of a carbonate