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What is the abundance of chlorine on earth?
Chlorine is the 21st most abundant element on Earth, making up approximately 0.19% of the Earth's crust by weight. It is found both in minerals and in the form of chloride ions in oceans, making it readily available in the environment.
What is natural abundance of chlorine?
The natural abundance of chlorine refers to the ratio of the stable isotopes chlorine-35 and chlorine-37 found in nature. Approximately 75.53% of chlorine atoms are chlorine-35, while about 24.47% are chlorine-37.
Does the northern hemisphere have more daylight hours on December 21st or June 21st?
The northern hemisphere has more daylight hours on June 21st, which is the summer solstice and the longest day of the year. December 21st is the winter solstice and has the shortest daylight hours of the year.
When was the first day of spring 1958?
The first day of spring in 1958 was on March 21st.
What is the legal calendar year for winter and summer months to start and end?
In the Northern Hemisphere, winter officially starts on December 21st and ends on March 20th, while summer officially starts on June 21st and ends on September 22nd. In the Southern Hemisphere, the dates are reversed, with winter starting on June 21st and ending on September 22nd, and summer starting on December 21st and ending on March 21st.
