An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.
20
the ans...
Chemistry, 09.12.2019 19:31, pineapplepizaaaaa
An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.
20
the answer is 25
Answers: 1
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Fossil fuels are organic compounds that are made from
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About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?
Answers: 2
Chemistry, 22.06.2019 19:20, evansh78
Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?
Answers: 3
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