Answer:
Magnesium oxide is a simple basic oxide, because it contains oxide ions. It reacts with water to form magnesium hydroxide which is a base.
Answer: Number of atoms in
of radon gas (radon atoms) at the same temperature and pressure is 
Explanation:
According to avogadro's law, volume of a gas is directly proportional to the number of moles present when temperature and pressure is constant.:


= moles of hydrogen gas = 

= moles of radon gas = ?


Thus the number of atoms in
of radon gas (radon atoms) at the same temperature and pressure is 
Answer:
<h2>Metamorphic</h2>
Explanation:
Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.
<h2>I hope it helps you keep safe</h2>