Each column is also called a group. The elements in each group have the same number of electrons in the outer orbital. As you keep counting the columns, you'll know how many electrons are in the outer shell.
According to the given requirements, w<span>hen you crush a first-aid pack for an injured athlete and the pack gets cold, </span> A chemical change has occurred, with energy being absorbed is the true statement.
1) single replacement
2) Zn + 2HCl -----> ZnCl + H
equation is already balanced
It’s a 50 50 chance unless one parent has a dominate gene