I can think of only one element offhand that, at that temperature, isn't a gas or a solid. That one is mercury, which is, of course, a liquid at room temperature. Oh, I think bromine is also a liquid at room temperature but I think it evaporates rather more easily than mercury at room temperature.
Anyway, there are many ways to answer this question yourself. You can look it up on Wikipedia. In the box on the right it says that the melting point of calcium is 1115 Kelvin, or 842 degrees celcius. Since room temperature (which is about 20 degrees celcius) is way below that temperature, you can be certain calcium is definitely a solid at room temperature.
Another, even easier way is to check the ever-so-useful periodic table. Unfortunately this periodic table is more colourful than the ones I grew up with, so it won't be quite so easy for you as I thought. The non-metals are at the top right of the table consisting of green, yellow, and blue. Hydrogen's a non-metal as well except when under intense pressure like in the center of Jupiter. Non-metals have certain characteristics, one being that many of them are gasses at room temperature. Those ugly brown coloured elements on the table are in between non-metal and metals and can have attributes of both. The metals, pretty much everything left of that ugly brown colour, have their own set of usual properties. One of them being that they're solid at room temperature. The only exception I can think of (though I'm no chemist) is mercury.