What are the horizontal rows in the periodic table called?

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

How is the atomic number of a nucleus changed by alpha decay