what is used to determine an atom's weight and atomic number?

Carbon A carbon atom has a mass number of 12 and an atomic number of 6. How many neutrons does it have?

Define mass number. What is the difference between mass number and atomic mass?

Define the term atomic weight. Why might the values of atomic weights on a planet elsewhere in the universe be different from those on earth?

Xenon An isotope of xenon has an atomic number of 54 and contains 77 neutrons. What is the xenon isotope’s mass number?

While traveling to a distant universe, you discover the hypothetical element X. You obtain a representative sample of the element and discover that it is made up of two isotopes, X-23 and X-25. To help your science team calculate the atomic weight of the substance, you send the following drawing of your sample with your report. In the report, you also inform the science team that the brown atoms are X-23, which have an isotopic mass of 23.02 amu, and the green atoms are X-25, which have an isotopic mass of 25.147 amu. What is the atomic weight of element X?

Give the complete symbol (XZA), including atomic number and mass number, of (a) a nickel atom with 31 neutrons, and (b) a tungsten atom with 110 neutrons.

Complete the following table. Atmos Number of Protons Number of Neutrons H24e N1020e T2248i O76190s C2750o

The mass of an atom is almost entirely contributed by its a. nucleus. b. protons. c. electrons and protons. d. neutrons.

1. The mass of an atom of manganese is 54.9380 u. How many neutrons are contained in one atom of this element? 25 29 30 55