CHEMISTRY MIDDLE SCHOOL

An investigation that is controlled is what

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Answer 1
Answer: when the the different things in an investigation are all in one way the same. Example: my project is to grow flowers in different shades of light I would still give the flowers the same amount of water and they would all be the same temperature. nothing but the diffrence in you project is  different 

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Which subatomic particle makes the atoms of each elements different?

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The subatomic particle that makes the atoms of each element different are the protons. The specific number of protons for a particular element distinguishes one element to another.

Why does the reaction H2O + Cu→no reaction not proceed to a product?The reaction proceeds too slowly to create products.


Copper has a higher activity than hydrogen and cannot replace it.


Copper has a lower activity than hydrogen and cannot replace it.


The reaction cannot occur because water is a reactant.



answer is Copper has a lower activity than hydrogen and cannot replace it.

Answers

Answer: Option (c) is the correct answer.

Explanation:

It is known that a stronger element is able to displace a less stronger element in a chemical reaction.

And, according to the reactivity chart hydrogen is more reactive in nature than copper.

Therefore, when Cu is added to H_(2)O then there will be no reaction because copper is less reactive than hydrogen.

Thus, we can conclude that the reaction H_(2)O+Cu \rightarrow \text{no reaction} not proceed to a product because copper has a lower activity than hydrogen and cannot replace it.
Copper has a lower activity than hydrogen

What are the two fundamental portions of an atom?​

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Number of Protons in an Uncharged Atom
The two main components of an atom are the nucleus and the cloud of electrons. The nucleus contains positively charged and neutral subatomic particles, whereas the cloud of electrons contains tiny negatively charged particles.

What is the first element on the periodic table?

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Hydrogen, H.

I hope this helps!
Hydrogen.
I hope this helps.

In a lab, Brett is mixing hydrochloric acid with water. This is an extremely explosive mixture that releases heat. What kind of reaction is this, endothermic or exothermic reaction

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The definition of an exothermic reaction is releasing heat and endothermic reaction is an absorption of heat.

This reaction is exothermic because it releases heat and doesn't absorb it when mixing hydrochloric acid with water. 
Exothermic because you are releasing heat not absorbing.

Two solutions are added together and the new solution becomes hot. This tells you that

Answers

chemical reaction you are fusing two chemicals that dont want to be mixed basically 
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