Which is another name for groups of elements
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Answer is: another name for groups of elements is family.
There are 18 numbered groups in the periodic table.
The elements in a group have similar physical or chemical characteristics and some groups have a specific name, for example group 17 (the halogens).
Elements in the group have the same number of valence electrons, for example, chemical elements in group 15 of the periodic table have neutral atom with a valence electron configuration of ns²np³.
Final answer:
In Chemistry, groups of elements are often referred to as families or groups.
Explanation:
In Chemistry, groups of elements are often referred to as families or groups. These groups are organized based on similar properties and characteristics. For example, the alkali metals (group 1) and the halogens (group 17) are two well-known families of elements.
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And 2nd ionization energy is higher than 1st ionization energy, 3rd is higher than 2nd, and so forth.
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I hope this helps. Let me know if anything is unclear.
Answer:
The answer is C!
Explanation:
I took the test ;)
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The most abundant element in the earth core is oxygen the most essential and precious gas. Second most abundant element is silicon.
What are elements?
Elements are the basic things in the universe. Everything in the world is made of elements. Elements combines to form molecules, molecules then forms compounds and compounds makes the macrothings.
There are various kinds of elements such as metals, gases, metalloids. etc. These all elements shows their characteristic physical and chemicals behaviours. Based on their electronic properties all the elements are classified into various groups in periodic table.
Oxygen is the most abundant element in the earth core that we all are used to intake for respiration. Oxygen s 8th element in periodic table and it is in P-block.
Silicon is the second most abundant element in the earth core. Silicon is a metalloids in 14th group of p-block and it is 14th element in periodic table. It is used in many electronic devises.
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Hope this helps!
Yes. The NaCl will precipitate.
Yes. The BaSO4 will precipitate.
Yes. Both the NaCl and the BaSO4 will precipitate.
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Yes. The BaSO₄ will precipitate in this type of double replacement reaction.
What is Double replacement reaction?
This is a type of reaction in which two reactants exchange ions to form two new compounds.
Na₂SO₄ (aq) + BaCl₂ (aq) ⇒ NaCl(aq)+ BaSO₄(s)
The precipitate which will be seen at the bottom of the reaction flask is solid BaSO₄.
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Answer: The correct answer is Yes, will precipitate.
Explanation:
Double displacement reaction is defined as the reaction in which exchange of ions takes place.
Precipitate is defined as the insoluble salt which emerges when two different solutions are mixed together. It settles down at the bottom of the flask after some time.
The chemical equation for the reaction of sodium sulfate and barium chloride follows:
Barium sulfate settles down in the reaction flask and is considered as a precipitate.
Hence, the correct answer is Yes, will precipitate.
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For example, to check the enthalpy change that occurs when benzene undergoes incomplete combustion to water and carbon monoxide is not an easy task, because the products invariably contain CO2. However, by combining the reactions of the complete combustion of benzene and the combustion of CO, you can get the reaction you want.
Reaction wanted: 2C6H6 + 9O2 → 12CO + 6H2O
Reactions provided: 2C6H6 + 15O2 → 12CO2 + 6H2O and 2CO + O2 → 2CO2, and their associated ΔH.
Rearrange the reactions so that, when they add up, they result in the wanted reaction.
2C6H6 + 15O2 → 12CO2 + 6H2O (leave as is; no changes to ΔH)
12CO2 → 12CO + 6O2 (reverse and multiply by 6; this changes the sign of ΔH and multiplies it by 6)
Added up, it will result in 2C6H6 + 9O2 → 12CO + 6H2O. Add up the ΔH values for the rearranged reactions to find ΔH for this particular reaction.
Answer: Hess's Law says the total enthalpy change does not rely on the path taken from beginning to end. Enthalpy can be calculated in one grand step or multiple smaller steps.
To solve this type of problem, organize the given chemical reactions where the total effect yields the reaction needed. There are a few rules that you must follow when manipulating a reaction.
The reaction can be reversed. This will change the sign of ΔHf.
The reaction can be multiplied by a constant. The value of ΔHf must be multiplied by the same constant.
Any combination of the first two rules may be used.
Finding a correct path is different for each Hess's Law problem and may require some trial and error.