It can be an element or a compound
Answer: A decomposition reaction occurs when one reactant breaks down into two or more products.
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Answer:
Between oxygen and selenium, oxygen is more electronegative because of more ionisation energy and small size
Explanation:
The correct answer should be B) Water vapor and carbon dioxide in the atmosphere trap heat.
The trapped heat cannot leave the atmosphere and as it is trapped, it increases the heat of the planet.
Answer: the top one is 5.3 s and the bottom one is tenths of seconds
Explanation: