Question 1
What is the first ionisation energy of an element?
Question 2
Which general trend is correct for first ionisation energy across Period 3 from sodium to argon?
Question 3
Why does first ionisation energy generally decrease down Group 1?
Question 4
Which explanation best accounts for the smaller drop in first ionisation energy from beryllium to boron in Period 2?
Question 5
Which pair shows a known exception where first ionisation energy decreases slightly even though the general period trend is increasing?
