Chemical bonding happens when two or more atoms join together to form a molecule. It is a general principle in science that all systems will try to reach their lowest energy level, and chemical bonding will only take place when a molecule can form that has less energy than its uncombined atoms.hemical bonding happens when two or more atoms join together to form a molecule. It is a general principle in science that all systems will try to reach their lowest energy level, and chemical bonding will only take place when a molecule can form that has less energy than its uncombined atoms.
Human beings were able to create tools around 2.5 million years ago-but we first made bows and arrows 64,000 years ago. The invention of the weapons was a huge leap for our ancestors, enabling them to hunt far more effectively.
In the 1500âs came the invention of gunpowder and by 1595. the longbow was replaced by the gun in the British Army. With. the efficiency and accuracy of gunpowder propelled projectiles. the longbow and arrow was reduced to a sport utilized for. recreation and exercise. In 1545 English author Roger Ascham publishes.