Define the terms atomic mass number
- Define the following terms atomic mass number
- Define the following terms atomic mass number class 8
- Define the terms atomic number mass number isobars isotopes
- Define the terms atomic number mass number and electron
- Define the terms atomic number and mass number of an element
- Define the terms atomic number and mass number provide examples
- Define the following terms a atomic number b mass number
- Define the word isotope in terms of atomic number and mass number
- Что такое молекулы и атомы