Atomic Theory. In 1897, English physicist J. J. Thomson (1856–1940) disproved Dalton's idea that atoms are indivisible. ... One of those parts is a negative tiny particle, which Thomson called a corpuscle in 1881.
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The correct answer is elements in family 7 have similar properties because elements in the same group or family have the same number of valence electrons.
Answer: 3390
Explanation:
Since this problem already gives is the equilibrium values, all we have to do is to plug them into the formula for 
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![K_{p} =\frac{[ICl]^2}{[I_{2}][Cl_{2}] }](https://tex.z-dn.net/?f=K_%7Bp%7D%20%3D%5Cfrac%7B%5BICl%5D%5E2%7D%7B%5BI_%7B2%7D%5D%5BCl_%7B2%7D%5D%20%20%7D)
Atoms are electrically neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged).
