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3 years ago

Transmutation involves___

Chemistry

2 answers:

forsale [732]3 years ago

6 0

(A)Nuclear change..............

ElenaW [278]3 years ago

3 0

Answer is: nuclear change.

Transmutation is a process that involves a change in the nucleus of an atom. It can be natural or artificial.

For example: 14/7 N + 4/2 He --> 17/8 O + 1/1 H.

This example is the first artificial nuclear transmutation described by Rutherford in 1919.

Artificial transmutation can be expressed by nuclear reaction:

Target Nuclide + Bombardment Particle → New Nuclide + Ejected Particle.

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Why is this temperature scale (Celsius) different and/or better than the other temperature scales?

Vesna [10]

Answer:

They are used because of preference or convenience, not necessity. These scales came about historically when there were no standards to calibrate a thermometer against. The Fahrenheit scale used the temperature of the coldest thing then known for its zero, which was salty ice.13-Oct-2019

8 0

2 years ago

Put atom in order from most to lest

Andrej [43]

Answer:

francium, caesium, helium

7 0

2 years ago

PLS HELP ME WITN THIS ILL GIVE BRAINLIEST

pantera1 [17]

A chemical property of a substance is a certain characteristic that can only be observed by participating in a chemical reaction. Alternatively, a chemical property of a substance is something that can only be observed when the substance undergoes a chemical change.

I'm not sure what you're supposed to do with the first four boxes; all four are examples of chemical properties. Do you have to name the specific type of chemical property as given in the description? If so, the following would be my answers:

Flammability/Combustibility: The ability of a substance to burn.

The next two are quite strange; I'm not aware of a term that cleanly describes reactivity with water or acid. I suspect that, given the level of the material here, the general property of "reactivity" might be the answer for both the second and third descriptions

(Water-)reactivity: Some substances react when put in water.

(Acid-)reactivity: Some substances react when put in acid.

Light sensitivity: Light can interact with some things to form new substances.

As for the chart, I've filled it in as shown in the attached image. Please take care to double-check what I've written; in particular, when it comes to the property, I might have used a different term from what you were taught in class or provided in some other resource that I don't have access to. I've also color-coded qualitative/quantitative and physical/chemical for your convenience.

3 0

2 years ago

19. Which of the following best describes the role of the spark from the spark plug in an automobile engine?

sergey [27]

The role of a spark plug is to supply some of the energy of activation for the combustion reaction.

<u>Explanation:</u>

A Spark plug is a tiny bolt of lightning in which a spark of electricity is emitted across a gap creating the ignition of the combustion chamber thereby starting the engine. By putting an engine piston in motion we can power up which produces a smooth burn of the compressed air-fuel mixture.

An electrical device that fits into the cylinder head and ignites compressed aerosol gasoline by an electric spark. They have an insulated electrode connected to a coil that ignites thereby producing sparks.
The spark plug works as a heat exchanger. They tend to pull unwanted thermal energy from the combustion chamber and heat is transferred to the engine's cooling system. Thus they supply some of the energy for the activation of engines.

4 0

3 years ago

Hi! I need some help with this pleaseeee!!

german

A) eventually they will be in thermal equilibrium

6 0

2 years ago