Sorry if i’m late but your answer should be infrared
The basic substances are called elements
The heart is special because it pumps blood to your body which makes you stay alive.
The transition metals are 10 columns wide because they can hold no more than 10 electrons. This is why their width correlates with the number of electrons that are included in these metals. Transition metals include most commonly used metals, such as iron, copper, silver, and gold.
