Answer: The moon
Explanation: hope this helps.
Answer:
Physical change is different in appearance while chemical change causes a new substance to form.
Explanation:
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Answer:
Astatine is a halogen with several isotopes that all have short half-lives.
Which of the following combinations of mass number and neutrons are possible as isotopes of astatine? Choose one or more:
i) A = 211, n = 127
ii) A = 210, n = 125
iii) A = 220, n = 134
iv) A = 207, n = 122
v) A = 209, n = 124
Explanation:
The mass number is the sum of the number of protons and the number of neutrons in an atom.![A=no.of protons+no.of neutrons\\=>no.of neutrons=A-no.of protons\\](https://tex.z-dn.net/?f=A%3Dno.of%20protons%2Bno.of%20neutrons%5C%5C%3D%3Eno.of%20neutrons%3DA-no.of%20protons%5C%5C)
Atomic number of At(astatine ) =85
That means it has --- 85protons.
Its mass number A=210
Hence, the number of neutrons in At are:
![n=A-Z\\=>n=210-85\\=>n=125](https://tex.z-dn.net/?f=n%3DA-Z%5C%5C%3D%3En%3D210-85%5C%5C%3D%3En%3D125)
Second option:
ii) A=210 , n=125 is the answer.
Answer:
225kg.m.s
Explanation:
Momentum equals to mass times velocity
Many protons would bypass ATP synthase, resulting in a sudden decline in ATP synthesis.