You should know how many electrons fit in each shell.
K 2
L 8
M 2
You can fit 8 electrons in the M shell but after filling up the first shells, there are only 2 electrons left. This means that there are 2 valence electrons.
It is 30 km/per second which equals D(67,000 m/h)
Answer:
The Tyndall effect is the scattering of light as a light beam passes through a colloid. The individual suspension particles scatter and reflect light, making the beam visible. The amount of scattering depends on the frequency of the light and density of the particles
Explanation:
And an activity to see if the solution doesn't show the tyndall effect is to try to shine a flaslight through it and see if you can see it coming out the other end
Density is mass divided by volume.
49g/14cm^3 = 3.5 g/cm^3
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<h2>hope it helps</h2><h2>stay safe healthy and happy.....</h2>