I have a question from school:
Assuming that the element Ca had not been discovered, predict using the properties of the known element surrounding Ca its own properties such as its atomic weight and density.
How do I go about this? I don't know how to predict this, it all looks like building blocks in my head. I can't connect the dots yet, please help me solve this. I have done some google searching but to no avail.
What I tried: I understand that
- atomic mass increase across the period;
- density increase across the period;
- density decreases down the group;
- atomic mass increases down the group.