3 years ago

What is perodic table list all the elements up to 30 with their valencies

1 answer:

8 0

Answer:

a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.

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What is the percent by mass of magnesium sulfate in MgSO4 · 7H2O?

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Answer: 48.83%

Explanation: Mass percent is the ratio of mass of the particular substance to the total mass of given compound.

${\text {mass percentage}}=\frac{\text{mass of }MgSO_4}{\text {total mass}}\times 100\%$

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Mass of $MgSO_4.7H_2O$ = 246g

${\text {mass percentage}}=\frac{120g}{246g}\times 100\%=48.83\%$

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The net force is 5 N and to the left.

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They cancel each other out so they are neutral.

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The attractive force that holds atoms or ions together is called chemical bond.

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Fluorine gas reacts violently with water to produce HF and ozone

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c8.3 moles

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What is perodic table list all the elements up to 30 with their valencies​

What is perodic table list all the elements up to 30 with their valencies