Asked in Atomic Mass
What does subatomic particles contribute to the value of atomic mass and atomic number?
protons is the same number as the atomic number always and protons plus the average number of neutrons makes up the atomic mass ...
Asked in Atoms and Atomic Structure
Why does the atomic weight decrease when the atomic number increases?
It doesn't. Atomic weight goes up as the atomic number goes up. In fact, atomic weight goes up faster than the atomic number does. Hydrogen atomic number 1, atomic weight 1.0079g/mole Uranium atomic number 92, atomic weight 238.02891g/mole ...
Asked in Atoms and Atomic Structure, Atomic Mass
An isotope has an atomic number of 8 and an atomic mass number of 18. How many neutrons does it have?
If the atomic number is 8, then it has 10 neutrons to give it an atomic weight of 18 With an atomic number of 8 it would be an isotope of oxygen - Specifically oygen-18 which makes up about 0.2% of all terrestrial oxygen. ...
What makes one atom of an element different from another?
The atomic number or z number or the number of protons is what makes one atom different from another. The atomic number or z number or the number of protons is what makes one atom different from another. ...
What makes up the atoms mass number?
The mass number is the average total of the number of protons and neutrons in the atomic nuclei of all the isotopes of that element on earth. Thus, the average number of neutrons in that element can be found by subtracting the atomic number from the mass number. ...
What makes up the atomic number and mass in an element of the periodic table?
The atomic number of an element is the number of protons in the nucleus of the atom; each element has its own distinct number. The atomic mass is the mass of the nucleus of the atom: protons and neutrons. One proton is equivalent to one unit of mass, as is a neutron. You can figure out the number of neutrons in an atom by subtracting the atomic number (number of protons) from the atomic mass; the difference is the number of...
What do you notice about the relationship between atomic number and number of protons?
Atomic number and protons mean the exact same thing so 5 protons makes an atomic number of 5 ...
Asked in Physics, Periodic Table
What role does atomic number play in the periodic tabel?
The atomic number is the number of protons in the atom. The number of protons is what determines the element the atom is. This makes the atomic number very important in determining what the atom is. ...
Asked in Atomic Mass
What makes up the atomic mass?
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. ...