Yes MgF2 is a pure substance
Gravitational potential energy is energy an object possesses because of its position in a gravitational field. The most common use of gravitational potential energy is for an object near the surface of the Earth where the gravitational acceleration can be assumed to be constant at about 9.8 m/s2.
Answer:
Option B
Explanation:
Energy required to remove outermost electron from an neutral atom is called ionization energy or first ionization energy (
)
Energy required to remove an electron from M+ ion is called second ionization energy (
).
Energy required to remove an electron from M2+ ion is called third ionization energy
).
Therefore, among the given options:



Therefore, the correct option is b
Non-Mellaeble and ductile