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3 years ago

PLEASE HELP ASAP WILL GIVE BRAINLIEST

Chemistry

1 answer:

soldier1979 [14.2K]3 years ago

8 0

Answer:

X+ ion cation is smaller than neutral atom because when one or more electrons are lose by an atom it usually result in lose of shell.

And when electron is removed positive/ negative charged ratio increas which causes more effective nuclear charge.

The more effective nuclear charge the less its size.

Explanation:

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Is fluorine a nonmetal or metal?

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Answer:

Nonmetal...

Explanation:

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3 years ago

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in a sample of silcon 92.21% of the atoms have a mass of 27.98 amu, 4.70% have a mass of 28.98 amu and 3.09% have a mass of 29.9

oksano4ka [1.4K]

Answer: 28.1 amu

Explanation:

Mass of isotope 1 = 27.98 amu

% abundance of isotope 1 = 92.21% = $\frac{92.21}{100}=0.9221$

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$\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})$

$A=\sum[(27.98 )\times 0.922+(28.98)\times 0.047+(29.97)\times 0.0309]$

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Therefore, the average atomic mass of silicon is 28.1 amu

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3 years ago

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vovikov84 [41]

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4 years ago

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