Physics, 21.11.2019 16:31 devinlj07

Be sure to answer all parts. indicate the number of protons, neutrons and electrons in each of these species: (a) 13 n 7 (b) 35 s 16 (c) 63 cu 29 (d) 89 sr 38 how many protons are in each isotope? how many neutrons are in each isotope? how many electrons are in each isotope?

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Answer from: davidaagurto

(a) No. of protons = atomic number = 7

No. of electrons = no. of protons = 7

No. of neutrons = mass no. - atomic no. = 6

(b) No. of protons = atomic number = 16

No. of electrons = no. of protons = 16

No. of neutrons = mass no. - atomic no. = 19

No. of electrons = no. of protons = 29

No. of neutrons = mass no. - atomic no. = 34

(d) No. of protons = atomic number = 38

No. of electrons = no. of protons = 38

No. of neutrons = mass no. - atomic no. = 51

Explanation:

No. of protons = No. of electrons = atomic number

No. of neutrons = Mass no. - atomic no.

(a) 13 N 7

Here atomic number is 7, mass number is 13

No. of protons = atomic number = 7

No. of electrons = no. of protons = 7

No. of neutrons = mass no. - atomic no. = 13 - 7 = 6

(b) 35 S 16

Here atomic number is 16, mass number is 35

No. of protons = atomic number = 16

No. of electrons = no. of protons = 16

No. of neutrons = mass no. - atomic no. = 35 - 16 = 19

Here atomic number is 29, mass number is 63

No. of protons = atomic number = 29

No. of electrons = no. of protons = 29

No. of neutrons = mass no. - atomic no. = 63 - 29 = 34

(d) 89 Sr 38

Here atomic number is 38, mass number is 89

No. of protons = atomic number = 38

No. of electrons = no. of protons = 38

No. of neutrons = mass no. - atomic no. = 89 - 38 = 51

Answer from: Quest

Hey hope you get the answer but i suck at math sorry : (

Answer from: Quest

Answer: it will take 4.36 seconds to reach her average velocity 10.69 miles/hour.explanation: we have equation of motion $s=ut+\frac{1}{2} at^2$ ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/s $s=0*t+\frac{1}{2} *2.18*t^2$ $s=1.09t^2[/ 2equating equation 1 and 2 [tex]4.75t = 1.09t^2\\ \\ t=4.36 seconds.$ so it will take 4.36 seconds to reach her average velocity 10.69 miles/hour.

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