The formula unit for a compound made from lead (Pb4+) and sulfur (s) is PbS2 or lead sulfide.
Sulfur has an anion, its in family 16; thus it has 6 valence electrons; therefore it will need to gain two electrons to attained an octet configuration, giving it a charge of 2-. Lead has four valence electrons; it will need to lose four electrons to be stable; it will therefore give the four electrons to two sulfur atoms.
You can infer that the different elements have different light spectrum frequencies, causing the different light colors.
<h2>
<em><u>The ground state of a quantum-mechanical system is its lowest-energy state; the energy of the ground state is known as the zero-point energy of the system. An excited state is any state with energy greater than the ground state. In quantum field theory, the ground state is usually called the vacuum state or the vacuum</u></em><em><u>.</u></em><em><u>.</u></em></h2>
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Answer:
The answer is a
Explanation:
conduction is the transfer of thermal energy when two substances of different temperature touch.
Answer:
"a chemical reaction in which acid and a base react quantitatively with each other"
Explanation: