They banned cfcs due to the hole it was causing in our ozone layer
Explanation:
<h3>The answer is option B .</h3>
If the atom is neutral then, the total number of electrons is the same as the number of protons. We calculate for the total number of electrons given the compressed electron configuration,
number of electrons of Xenon (Xe) = 54
The total number of electrons after Xenon,
= 2 + 14 + 7 = 23
Adding up all the number of electrons, we have,
total number of electrons = 54 + 23 = 77
The identity of this element is Iridium (Ir). This element belongs to the class of Group 9. This is the transition metal.
Because energy is needed to alive so when glucose goes into oxygen cells it provides energy in the form of Atp
To calculate the atomic mass of a single atom of an element, add up the mass of protons and neutrons. Example: Find the atomic mass of an isotope of carbon that has 7 neutrons. You can see from the periodic table that carbon has an atomic number of 6, which is its number of protons.
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