Answer:
Boiling Point
Explanation:
The boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas above it.The normal boiling point of a liquid is the temperature at which its vapor pressure is equal to one atmosphere (760 torr).
In the periodic table, the group number of astatine is 17 while that of tellurium is 16, hence the size of astatine is larger as compared to tellurium as it has one more shell present in it's atom.
Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.
It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.
Elements present in the same group have same number of valence electrons and hence have similar properties while elements present in the same period show gradual variation in properties due to addition of one electron for each successive element in a period.
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b. Carbon is ranked seventeenth in abundance in Earth's crust.
c. Carbon is readily found combined and uncombined in nature.
d. Carbon is found in all living matter and in common fuels including coal.
All the statements are true about carbon except option a. Carbon is not a major component of inorganic molecules.
Carbon is 6th element in periodic table. It is in 14th group and is a non-metal or gas. Carbon is present in all living matter and in common fuels including coal.
Carbon can be readily found in combined or non-combined state. Carbon is the major component of organic molecules and not that of inorganic molecules.
Organic molecules are hydrocarbons or their derivatives whose backbone is carbon chain. Therefore, option a is not true about carbon.
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true or false inside a nuclear power plant nuclear fission takes place within the heat exchanger
Answer:
Correct answer: B). Global climate is changing due to burning of fossil fuels and deforestation.
Forest holds a large amount of carbon, plants are known to absorb carbon dioxide from the atmosphere as they grow, that carbon dioxide is stored in plants in the form of carbon in plant's roots, leaves and in the soil. When trees are cut down, that stored carbon is released in the environment in the form of carbon dioxide, which accounts for approximately 18% of global greenhouse gas emission.
The burning of fossil fuel like coal, petroleum, oil, gas for the energy purpose is one of the major contributors for the rising level of carbon dioxide in the atmosphere, which leads to global warming and affect the climate.
Hence, the correct answer would be option B.
Explanation: