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2 years ago

The _ __ is the bottom number on each element?

1 answer:

7 0

The full chemical symbol for an element shows its mass number at the top, and its atomic number at the bottom

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3 years ago

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Explanation:

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2 years ago

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Which elements above will form cations? List them below.

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2 years ago

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2 years ago

Calculate the number of moles equivalent to 12.7 gram of iodine molecule

Alexus [3.1K]

$\LARGE{ \boxed{ \purple{ \rm{Answer}}}}$

☃️ Chemical formulae ➝ $\sf{I_2}$

How to find?

For solving this question, We need to know how to find moles of solution or any substance if a certain weight is given.

$\boxed{ \sf{No. \: of \: moles = \frac{Given \: weight}{Molecular \: weight} }}$

Solution:

❍ Molecular weight of $\sf{I_2}$

= 2 × 126.90

= 253.80

= 254 (approx.)

❍ Given weight: 12.7

Then, no. of moles,

⇛ No. of moles = 12.7 / 254

⇛ No. of moles = 0.05 moles

⚘ No. of moles of Iodine molecule in the given weight = 0.05 moles

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3 years ago

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The _________ __________ is the bottom number on each element?

The _ __ is the bottom number on each element?