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natima [27]
3 years ago
8

What are the atomic and mass numbers for the periodic table of elements

Chemistry
1 answer:
chubhunter [2.5K]3 years ago
8 0

there you go, hope that helps

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Chemical change example
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Answer: burning paper

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The paper burns in air to form smoke and ash. which makes it a chemical change.

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Name element atomic mass 26 mass number 58 with charge of 2+
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subtract the answer it'll get you that.

Explanation:

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21+ Cl2 → 12+201 -
Alina [70]

Answer:

\rm 2\; I^{-} + Cl_2 \to I_2 + 2 \; Cl^{-}.

Start color: yellowish-green.

End color: dark purple.

Assumption: no other ion in the solution is colored.

Explanation:

In this reaction, chlorine gas \rm Cl_2 oxidizes iodine ions \rm I^{-} to elemental iodide \rm I_2. At the same time, the chlorine atoms are converted to chloride ions \rm Cl^{-}.

Fluorine, chlorine, bromine, and iodine are all halogens. They are all found in the 17th column of the periodic table from the left. One similarity is that their anions are not colored. However, their elemental forms are typically colored. Besides, moving down the halogen column, the color becomes darker for each element.

Among the reactants of this reaction, \rm I^{-} is colorless. If there's no other colored ion, only the yellowish-green hue of \rm Cl_2 would be visible. Hence the initial color of the reaction would be the yellowish-green color of \rm Cl_2.

Similarly, among the products of this reaction, \rm Cl^{-} is colorless. If there's no other colored ion, only the dark purple hue of \rm I_2 would be visible. Hence the initial color of the reaction would be the dark purple color of \rm I_2.

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A chemistry student weighs out 0.0475g of sulfurous acid H2SO3, a diprotic acid, into a
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I don't know but look on the internet or use a calculator 
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Read 2 more answers
How are compounds Similar to elements and how are they different​
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Answer:

A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule.

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2 years ago
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