Answer: Atoms lose energy as a gas changes to a solid.
Explanation:
Answer: Option (C) is the correct answer.
Explanation:
The elements of group 2 are also known as alkaline earth metals. Thus, each element of group 2 is an alkaline earth metal.
Group 2 contains six elements from to bottom which are as follows.
Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba) and Radium (Ra). Out of which radium is a radioactive element.
Mass: 1.98892 x 10^30 kg
Diameter: 1,391,000 Kilometers
Radius: 695,500 km
Surface Gravity: 27.94 g
Volume: 1.412 x 10^18 km^3
Density: 1.662 x 10^5 kg/m^3
