Its 70 and more because its right
The elements in each group have the same number of electrons in the outer orbital<span>. Those </span>outer<span> electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements. Every element in the first column (group one) has one electron in its </span>outer<span> shell.</span>
Answer:
New substances are produced by a chemical change
<u>Chemical</u>. The copper atoms form new chemical bonds with atoms in the air.
