C. added an electron to the outer electron shell.
Explanation:
Atoms consist of three particles:
- Protons: they are located in the nucleus, they have positive charge of
, and mass of ![1.67\cdot 10^{-27}kg](https://tex.z-dn.net/?f=1.67%5Ccdot%2010%5E%7B-27%7Dkg)
- Neutrons: they are also located in the nucleus, they have no electric charge, and mass similar to that of the proton
- Electrons: they orbit around the nucleus, they have negative charge of
, and mass around 1800 smaller than the proton
Normally, atoms are neutral (no electric charge), because they have an equal number of protons and electrons.
However, sometimes atoms can give off or take electrons from other atoms. We have two cases:
- If an atom gives off an electron, it remains with an excess of positive charge, so it becomes a positive ion
- If an atom takes an electron from another atom, it remains with an excess of negative charge, so it becomes a negative ion
Therefore, in order to form a negative ion, the atom must have
C. added an electron to the outer electron shell
Learn more about atoms:
brainly.com/question/2757829
#LearnwithBrainly
Answer:
kinematics
the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion
The answer is b. False because radiation transfers energy by the propagation of waves within the electromagnetic spectrum and the travel of photons. Therefore, no matter is moved within this process.
Answer:
W = 1493.9 J = 1.49 KJ
Explanation:
The work done by the elevator on the object will be equal to the gain in is potential energy:
W = ΔP.E
W = mgΔh
where,
W = Work = ?
m = mass of object = 7.4 kg
g = 9.8 m/s²
Δh = gain in height = 20.6 m
Therefore,
W = (7.4 kg)(9.8 m/s²)(20.6 m)
<u>W = 1493.9 J = 1.49 KJ</u>