A substance that cannot be broken down into simpler substances by chemical or physical means is called <u>an element. </u>
Explanation:
An element is the ‘purest and simplest’ form of matter or a substance.
An element is considered pure because all of its atoms are of a similar kind with a unique set and same defined number of protons. The atoms of an element exhibit the same set of properties. They can neither be broken down further into simple components nor can be converted to another element. Similarly, elements also cannot be destroyed or created by a chemical reaction. There are around 118 elements like oxygen, hydrogen, carbon, gold, iron, copper, platinum etc.
Answer:
Complexicity, Controversary atlases and simplicity
Explanation:
Answer:
ENSO is the most prominent known source of inter-annual variability in weather and climate around the world.
Explanation:
Over a period of 28 months the dominant wind changes from easterly to westerly and back.
B. U-238 is the parent ans lead is the daughter.