15) EXTRA KNOWLEDGE + NATIONAL 5 Flashcards
1
Q
What is displacement
A
More reactive metal kicks less reactive metal from their solution and takes its place
(Only happens between metals reacting with metal solutions)
E.g:
Fe(s) + CuSO4(aq) –> FeSO4(aq) + Cu(s)
2
Q
What is an isotope
A
Same atomic number but different mass numbers due to a difference in the number of neutrons
3
Q
What is an isomer
A
Same molecular formula, different structural formula
4
Q
What is the MP and BP of a gas, liquid and solid
A
Gas:
MP & BP ℃
Solid:
MP & BP > 25℃
5
Q
How do you work out atomic number
A
= protons
= electrons
6
Q
How do you work out mass number
A
Protons + Neutrons
7
Q
How do you work out protons
A
= atomic number
= electrons
8
Q
How do to work out mass number
A
Mass number - Protons (atomic number)
9
Q
How do you work out electrons
A
= protons
= atomic number
