Pumice rocks are formed due to the air that is trapped in
between the rocks, a body of magma spurting out with dissolved gas under
pressure. As the magma cracks through the Earth’s surface, the sudden pressure drop
causes the gas to come out of the solution. The flash of gas form the vent slices
the magma and blows it out as a molten lather. The lather hastily solidifies as
it flies into the air and falls back to Earth as pieces of pumice.
Answer:
False, they do not have a fixed temperature
Explanation:
The outer electron of atom B has moved to a higher energy state.<span>B - 1s2, 2s2, 2p6, 5s1 </span>
Answer:
a) a space in an atom where an electron is most likely to be found
Explanation:
Atomic orbital is the mathematical function which describes wave-like behavior of the electrons present in the atom.
It is used to calculate probability of finding the electron of the atom in any region around nucleus of the atom. Atomic orbital is the physical region or a three dimensional space where the probability of finding the electron is more than 90% which also means that the space where an electron is most likely to be found. They are boundless space and have definite energy.
Option A best describes atomic orbital.
Group 18 is known as the Noble/ Inert Gases