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elixir [45]
3 years ago
6

Please hurry!!! And help!!

Chemistry
2 answers:
11Alexandr11 [23.1K]3 years ago
5 0

Answer:

D

Explanation:

natali 33 [55]3 years ago
4 0

Answer:

D

Explanation:

Because it is true

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Define natural and artificial hazards?<br><br><br>wrong and silly answer will be reported​
kotegsom [21]

Explanation:

See this l know natural only

4 0
2 years ago
5. An element whose highest occupied s sublevel and a nearby d sublevel <br> contain electrons
Mumz [18]

Answer:

                    Transition Element

Explanation:

                     Transition elements are defined as those elements which can form at least one stable ion and has partially filled d-orbitals. They are also characterized by forming complex compounds and having different oxidation states for a single metal element.

                      Transition metals are present between the metals and the non metals in the periodic table occupying groups from 3 to 12. There general electronic configuration is as follow,

                                                   (n-1)d ¹⁻¹⁰ns ¹⁻²

The general configuration shows that for a given metal, the d sublevel will be in lower energy level as compared to corresponding s sublevel. For example,

Scandium is present in fourth period hence, its s sublevel is present in 4rth energy level so its d sublevel will be present in 3rd energy level respectively.

Hence, we can conclude that for transition metals the electron are present in highest occupied s sublevel and a nearby d sublevel .

5 0
3 years ago
Which of the following abilities is NOT a physical property of matter?
Morgarella [4.7K]

Answer:

Ability to react chemically with other substances is not a physical property.

Explanation:

The ability to dissolve in other substance can be both physical and chemical property.

It depend upon the type of solute, solvent and reaction between them.

For example, if NaCl is dissolved in water it gives sodium and chloride ions which are behaving different from the original compound. it will be chemical change but if water is evaporated it will give back sodium chloride and than it will be a physical change.

But if dissolved substances make the mixture not compound it will than a physical change, and solubility will consider a physical property.

Physical properties:

The properties which are not associated with change in chemical composition are called physical properties.                                                                                          

Example

Density, color, hardness, conductance, melting point, boiling points all  are physical properties.

Chemical properties:

The properties which are associated with change in chemical composition are called chemical properties.        

Example:

Toxicity, flammability, heat of combustion etc.

Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

The reaction of Hydrogen and oxygen:

H 2 (g)  + O 2  (g) -------------------------------------> 2H 2O  (l)

8 0
2 years ago
[02.01]Which of the following is essential for a theory to become widely accepted within the scientific community?
mezya [45]
I think maybe empirical evidence
4 0
3 years ago
“Aqueous calcium hydroxide reacts with carbon dioxide gas to produce solid calcium carbonate and liquid water.” Which chemical e
Svetlanka [38]
Ca(OH)2(aq) + CO2(g) —> CaCO3(g) + H2O(l)
4 0
3 years ago
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