According to scientists how was the universe created

1 answer:

4 0

The Big Bang Theory threw matter within what we now call space. Allowing for it to expand and create more and more and as the Universe cooled, the material came together and formed galaxies, stars, and planets, ect...

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balandron [24]

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3 years ago

3. Rb(CN) (aq) + Znl, (aq) → What is the production

Salsk061 [2.6K]

Answer: RbI (aq) and Zn(CN)2 precipitate

Explanation: zinc cyanide is insoluble in water.

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3 years ago

Which shows a correct association between a structure and one of its functions?

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Answer:

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Rank the ions in each set in order of increasing size, and explain your ranking:

Paha777 [63]

Explanation:

Lithium, sodium and potassium are all group 1A elements and when we move down a group then there occurs an increase in atomic size of the elements. As lithium is the smallest and potassium being the largest so, when each of them will lose an electron and obtain a positive charge then size of lithium will further decrease.

Therefore, ions are ranked according to their increase in size as follows.

$Li^{+} < Na^{+} < K^{+}$

When an atom tends to gain electrons then it acquires a negative charge. This means that size of the atom increases.

So, more is the negative charge present on an atom more will be its atomic size. Therefore, correct order of increasing size for $Se^{2-}, Rb^{+}, Br$ is as follows.