Yes, leaving a bruise on a child's arm from slapping can be considered physical abuse. Physical abuse is any act of intentional physical harm or injury inflicted on a child. Slapping a child hard enough to cause a bruise is not only physically harmful but can also have significant emotional and psychological consequences for the child.
It's essential to remember that physical punishment or violence is not an effective or appropriate way to discipline a child. There are more positive and constructive methods of discipline that focus on teaching and guiding children, rather than inflicting pain or harm.
If you or someone you know is experiencing or witnessing child abuse, it's important to report it to the appropriate authorities immediately. Child protection agencies, local law enforcement, or child welfare organizations can investigate the situation and provide support to ensure the child's safety and well-being.