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morpeh [17]
3 years ago
6

A chemist is looking at an electrically neutral atom that has three valence electrons. If she knows the element is a metalloid,

which one (or ones) is it?
Chemistry
1 answer:
Rus_ich [418]3 years ago
8 0
Your answer is boron,

I looked at the periodic table, there is nothing else that falls under this specs.


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Why is Avogadro’s number referred to as a mole? If you could change this terminology, what would you change it to and why?
stepan [7]

The number of particles (molecules, atoms, compounds, etc.) per mole of a substances is known as Avagadro number. It is equal to 6.022×10^23 mol-1 and is expressed as NA.


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One mole of a substance is the ratio of mass of the substance by the molecular mass of the substance. Thus the mass of one mole of a substance is equal to the substance's molecular weight. Thus one mole of a substance is the atomic mass unit of a substance and since one mole is equivalent to the Avagadro number,we can conclude that one Avagadro number is one atomic mass unit of the substance.

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3 years ago
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postnew [5]

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Explanation:

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Oksanka [162]

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3 years ago
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