Answer: read your book
Explanation: if you read it should be in there
Answer:
B
Explanation:
the number of electrons is always equal the number of protons
amu - atomic number = no of neutrons
As there is a strong electrostatic force of attraction between the positive metal ions and the negatively charged electrons, more energy is needed to overcome these forces of attractions and hence, high melting and boiling points
Hope this will help you
If so, do make this a brain lister :)