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vazorg [7]
3 years ago
13

The atomic number of an element is determined by the number of A. electrons. B. protons. C. protons and neutrons. D. neutrons.

Physics
1 answer:
sergiy2304 [10]3 years ago
7 0

Answer: C

Explanation: The atomic number of an element is determined by the number of protons because the number of protons in the nucleus of an atom is equal to the number of atoms.

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Electrons in an atom make up most of the _________ of the atom, while the protons and neutrons make up nearly all of the _______
Vinvika [58]

Answer:

volume;mass

Explanation:

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3 years ago
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Why is it necessary for cells to be so small​
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2 years ago
A certain shade of blue has a frequency of 7.15 × 1014 hz. what is the energy of exactly one photon of this light?
Ket [755]
The energy carried by a single photon of frequency f is given by:
E=hf
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E=(6.6\cdot 10^{-34}m^2 kg s^{-1})(7.15 \cdot 10^{14}Hz)=4.7 \cdot 10^{-19}J
4 0
3 years ago
7. An 8 kg ball is travelling to the east at 10 ms', collides with a 2 kg ball travelling to the
Ymorist [56]

Answer:

The final velocity of the ball is 7m/s

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initial momentum before collison

m1v1+m2v2

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final momentum after collison

=(m1+m2)×v

=(8+2)×v

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According to the law of conversion of momentum

initial momentum =final momentum

70=10v

10v=70

v=70/10

v=7m/s

3 0
3 years ago
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Art [367]

Answer:

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8 0
3 years ago
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