C, all cells contain chloroplast, is not part of the cell theory.
Opaque materials absorb all the light that shines on them. None of it comes out the other side. That's why they're opaque.
Opaque materials become warmer when light shines on them, because <em>they absorb the energy</em> carried by the light that shines on them. (According to the law of Conservation of Energy, that energy has gotta go somewhere.)
Highly
Explanation:
An atom that has one electron in its valence electron shell is highly chemically reactive.
Such atoms are called Alkali metals. They occupy the first group on the periodic table and they are a bunch of metals.
- The number of electrons in the valence shell of atoms determines the reactivity of an element.
- Atoms are gained or lost or shared in order to attain an octet configuration.
- When an atom with one electron in the valence shell loses this electron, it will become stable.
- This implies that it will attain its octet.
- This makes them take part in reactions that will ensure they lose that electron.
- Examples of such atoms Li, Na, K, Rb, Cs and Fr.
learn more:
Reactivity of Na brainly.com/question/6496202
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Light travels slowest through solids. Out of all solids, it travels slowest through diamond.
