Thanks, everyone, for being so helpful. I have mince pies for another answer so not that for No. 2. I wondered about Charades for No. 1 but where would the 'u' fit in? Glad to get No. 4 solved, thank you, mallyh. Any more thoughts for No. 3?
3 gold
It's Elemental - The Periodic Table of Elements - Elements ...
The Periodic Table of Elements ... Elements Listed by Atomic Number. 1: Hydrogen: H: 2: Helium: He: 3: Lithium: Li: 4: Beryllium: Be: 5: ... 79: Gold: Au: 80: Mercury ...