Gaps Flashcards
1
Q
How do you calculate bond energy change?
A
Reactants (energy in) - Products (energy out)
2
Q
State 3 things that are different about Mendeleev’s periodic table compared to the modern day one
A
• Mendeleev’s has only atomic mass and not atomic number
• Mendeleev’s has no group 8/ 0
• Mendeleev’s has gaps for undiscovered elements
3
Q
What is meant by Avagadro’s constant?
A
The number of entities in 1 mole
4
Q
How do you calculate number of molecules?
A
Avagadro’s constant x Number of moles
