Sections | |||
---|---|---|---|
Periodic Table | 28 mins | 0 completed | Learn |
Mole Concept | 37 mins | 0 completed | Learn Summary |
Isotopes | 12 mins | 0 completed | Learn Summary |
Mass Spectrometry | 9 mins | 0 completed | Learn |
Subatomic Particles | 8 mins | 0 completed | Learn |
Atomic Theory | 16 mins | 0 completed | Learn |
Thomson's Cathode Ray Tube Experiment | 8 mins | 0 completed | Learn |
Oil Drop Experiment | 7 mins | 0 completed | Learn |
The Chadwick Neutron Experiment | 6 mins | 0 completed | Learn |
Gold Foil Experiment | 10 mins | 0 completed | Learn |
End of Chapter 2 Problems | 28 mins | 0 completed | Learn |
Additional Guides |
---|
Periodic Table Charges |
Calculating Molar Mass |
Calculating Grams to Moles |
An ion has 20 protons, 18 electrons, and a mass number of 41.
Part 1
How many neutrons does this ion have?
Part 2
What is the symbol for this ion? Enter both the mass and the atomic number.
Enter your friends' email addresses to invite them:
Join thousands of students and gain free access to 46 hours of Chemistry videos that follow the topics your textbook covers.