Chapter 3, Problem 44A

Interpretation Introduction

Interpretation :

Three examples each of the elements present in liquid and gaseous at ${\text{30}}^{\text{°}}\text{C}$ needs to be given.

Concept Introduction :

The periodic table is divided into two forms one is a vertical column and the other one is horizontal. The elements are differentiated as metals non-metals and metalloids. The physical properties as density, tensile nature, and conductors for heat and electricity that explains about the metals and non-metals.

Answer to Problem 44A

Three examples of elements are mercury, bromine, and cesium which are liquids at ${\text{30}}^{\text{°}}\text{C}$ , and oxygen, nitrogen, and hydrogen are the examples of elements that are gases at ${\text{30}}^{\text{°}}\text{C}$ .

Explanation of Solution

The majority of metals are found in a solid except for some that are present in liquid state at room temperature. Mercury as a metal is liquid, and non-metal bromine is present in liquid state.

The gaseous non-metals are hydrogen, helium, nitrogen, oxygen, fluorine, neon, chlorine, argon, krypton, xenon, and radon.

Conclusion

There majority of the non-metallic elements that are gaseous in state and metals are generally present in solid state. There is exception for some non-metallic elements and metallic elements which are present in liquid state.