A student puts some sugar in a glass of water and stirs until the sugar is dissolved. Why is sugar dissolving in water an example of a physical change?
O because the sugar and water are both clear
B. because the sugar gives off gas bubbles when it is dissolved in the water
O c because the student started with sugar and water, and ended with sugar and water
O D. because the sugar and water molecules break apart, and then recombine in different ways

It does not change the identity of a substance. Sugar if dissolved in water is still sugar.

Explanation:

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

your answer is c) plasma

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