meganwintergirl
29.08.2020 •
Chemistry
Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208.
The average atomic mass of lead is 207.2. Which isotope of lead is likely
to be the most abundant?
204
207
206
208
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Ответ:
They have the same number of electron energy levels.
They transition from a metal to noble gas.
Explanation:
Periods in the periodic table of elements refer to elements in the same row. All the elements in a certain row of the periodic table;
have the same number of electron energy levels.
transition from a metal to noble gas.