Mass Number - Page 5
Questions
- Derive the charge to mass ratio (#e//m#) for an electron?
- How many neutrons are present in the nucleus of a phosphorus atom?
- For #Al#, its atomic number is 13 and its mass number is 27. How many neutrons does it have?
- An atom of copper has a mass number of 63 and an atomic number of 29. How many protons does it have?
- How can the mass number be calculated?
- How is the mass number related to the number of protons and neutrons an atom has?
- How is the atomic mass number changed by gamma decay?
- Does an atoms mass number or atomic number ever change?
- An isotope of U-235 has 92 protons in its nucleus. How many neutrons are there in the nucleus of a U-238 isotope?
- How many atoms are in 167 g of calcium?
- What is the mass number of an ion with 104 electrons, 157 neutrons, and a +1 charge?
- How many protons in the #P_4# molecule?
- What is the formula weight of methane?
- What does the difference between the mass number and the atomic number tell us?
- How many neutrons in the iron nucleus?
- Does the mass number of an element ever change?
- Is there a difference between relative atomic mass and mass number?
- An atom contains 70 protons, 70 electrons, and 99 neutrons. What is the mass number?
- When the mass number of oxygen is 16, how many neutrons does oxygen have in its nucleus?
- What is the formula mass for the following compound #Fe(NO_3)_3#?