Miguel used a balance to compare the masses of two boxes that are the exact same size and weight when empty. When he placed a box on each side of the balance, it tipped on one side. Which of the following would explain why this happened? Since the boxes have the same size and weight, the boxes need to be placed on the scale at the same time to balance it.
The boxes have different masses because they have different objects inside them, meaning one has more matter.
The cardboard is thinner on one of the boxes, making its mass greater than the mass of the other box.
The scale must be broken since the boxes have the same size and weight, the mass of the boxes should be the same.

answer: find it ur self

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

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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