Answer: (a) chromium (b) tungsten (c) tungsten
Explanation:
As we move towards the right in the periodic table, atomic sizes decreases and electronegativity increases accordingly. Similarly, atomic sizes increases down the group. Hence chromium is smaller than tungsten.
However, tungsten is more electronegative than the other metals listed, as a result of this, it also has the highest first ionization energy. Hence the answer above.
