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Answer: different charges but same mass
protons and neutrons determine the mass (electrons are too light)
since atom q and atom r are of the same proton and neutron , they are of the same mass
protons and electrons determine the charge
a proton has a 1+ and electron has a 1- charge
atom q has no charge, the protons and electrons cancel each other out
atom r has a 1- charge as there is one more electron than proton.
It can form 3 bonds because 1 electron is in each of the 3 2p orbitals.
<span>The electron configuration of nitrogen (atomic number 7) is 1s2 2s2 2px1 2py1 2pz1 </span>
<span>so specifically the 2p oribital is : </span><span>2px1 2py1 2pz1</span>
Answer:- The wavelength is and the right option is D.
Solution:- Wavelength is inversely proportional to the frequency and the equation is:
where, is the wavelength, c is the speed of light and is frequency.
Frequency is and the speed of light is .
Since,
So,
Let's plug in the values in the equation:
Hence, the right option is D) .
Physical properties define the appearance of that substance.