Graphite rods at the ready!!?

Question

Hg is an element with a very unusual property compared to its neighbours on the periodic Table. The easy bit would be to tell what that is

But the challenge: What is the three other elements which shares that property.

Regulars may know the answer, but they should know the drill. Fastest finger first, and detailed answers are the nice ones (oh, and none of this cut & Paste off Wikipedia cheating, thats Laziness, not scientific).

I ussually provide a morning wake up chance as a break for the thinkers from the mundane questions, however this unfortunately will be the last question on the morning brain workout. More details of why can be found here:-
http://uk.geocities.com/gleech401/quizend.html

Answer 1

It is a metal which is liquid at room temperature. Three other elements with that property are gallium, caesium, and francium.

Answer 2

Well I think you're probably referring to the fact that it (Mercury) is liquid at room temperature. The number of other elements it shares this property with kind of depends on what you consider room temperature, but since you're looking for 3 I'll go for Caesium (Melting Point 28C), Francium (MP 27C) and Bromine (MP -7C), although to be honest since my definition of room temperature is around 21-25C, only Bromine and Mercury are liquids at this temperature. Gallium is the metal with the next lowest melting point, just under 30C.

Answer 3

ah quicksilver i loved thee well. it's a liquid at RT and that's what makes it fun.

so are gallium, cesium, and francium. they're fun too in their own ways, and yes i'm with the american spelling though caesium is a fun word

Answer 4

urm, i'm still thinking but i'm guessing nickel, and some two other metals which i can't remember their names..