They then use the average atomic mass to convert this mass into the number of atoms. What types of atoms are most common in the universe? The most common type of atom in the universe is hydrogen, making up about 74% of the universe's elemental mass. Helium is the second most common,...
How to calculate atomic mass of isotopes How to calculate the relative atomic mass of an element? How is the atomic mass of an element calculated? How can you calculate the number of neutrons (n) in an atom? How are atomic numbers and mass numbers written?
Avogadro's number is 6.022×1023 and represents how many particles of interest are in one mole of a substance. The number is named after Amadeo Avogadro, an Italian scientist known for his work with gases in the early 19th century.Answer and Explanation: We are...
Thus, the number of protons in an atom identifies it as an atom of a particular element. The number of protons in an atom is referred to as the atomic number. 因此,原子中的质子数决定了原子的种类。原子中的质子数等于其原子序数(元素序数)。 The information provided by the periodic table for...
Each element on the periodic table has an atomic mass -- an approximation of the mass of a single atom of that element. Because atoms are so small, a specific unit is used to measure the mass of small quantities of atoms. Very large quantities of atoms a
One atomic mass unit is defined as a mass that is one-twelfth of a Carbon-12 atom. Carbon is taken as a standard element because there is no other element whose nucleus has a balanced number of protons and neutrons in it. How to Calculate Atomic Mass? The combined masses of protons ...
1.how are the atomic numbers and the atomic masses of the elements related to how the elements are arranged on the periodic table?2.how does the number of electrons relate to the arrangement what is the different in the number of electrons in a 3rd period element and the 2nd period ...
How to determine the atomic number of an atom? How many neutrons are there in an atom that contains 3 protons and has an atomic weight of 5 amu? How do isotopes of an element differ? Explain the difference between the atomic number and the atomic weight of an element. ...
If you know the atomic number and the mass number of an isotope of an element, how can you determine the number of protons and neutrons?Answer and Explanation: The atomic number is equal to the number of protons in an atom. For e...
To calculate the atomic mass of asingle atomof an element, add up the mass ofprotons and neutrons. Example: Find the atomic mass of an isotope of carbon that has 7neutrons. You can see from the periodic table that carbon has an atomic number of 6, which is its number of protons. The...