Which of the following properties listed in the table below are usually identified with alkaline earth metals. * 1. soft silvery white color 2. poor conductors of thermal energy 3. atoms contain two valence electrons 4. liquid at room temperature 5. readily form 2+ cations. 0 1 and 3 0 1,3, and 5 0 2,4, and 5 0 2 and 4