Because flame provides a source of heat so that the magnesium metal atoms can overcome their activation energy. Activation energy is the minimum energy required in order for a chemical reaction to proceed. When the magnesium metal burns it reacts with oxygen found in the air to form Magnesium Oxide.
Argon is a suitable choice for light bulbs because it is inert. Compared to a reactive gas like oxygen, the metal filimant would burn up in a reactive environment, which is why a noble gas is used.
The sets of characteristics describe what we know about
the inner planets is that have rocky
surfaces, no rings, and few or no moons. The answer is letter C. Also, they are
smaller in sizes compared to the outer planets. The rest of the choices are
characteristics of the outer planets.
<span>A cation is an atom that loses a valence electron. When a valence electron is released there is one electron less to create a repulsive force. The loss of a repulsive force will allow the atom to pull tighter together. An anion would therefore be larger in size due to increased repulsion of the valence electrons.</span>
Blue is the color that can be best absorbed, as orange is the color seen.
