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alisha [4.7K]
3 years ago
7

What is a chemical reaction

Chemistry
2 answers:
Mariulka [41]3 years ago
8 0
Something that cannot be changed back ,
mr_godi [17]3 years ago
7 0
Answer: a chemical reaction is a process that leads to a reaction of the the chemical substance to another...

Step by step explanation: brainlist?
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Select all that apply. The electron configurations of some elements are given. Based on the electron configurations which elemen
erma4kov [3.2K]

Answer:

correct option: A and D

Explanation:

generally element from d block can for ion with multiple charge and having incomplete outershell means element do not have fullfiled or half filed orbital because in these case it takes more energy to remove valence shell electron.

8 0
3 years ago
Lons form because the loss of one or more electrons makes
ruslelena [56]

This statement lons form because the loss of one or more electrons makes them less stable than their corresponding atoms; this state requires more energy to maintain is FALSE.

  • An ion forms when an atom loses or gains one more electrons.
  • This loss or gain of electrons causes the ion to gain the stable octet configuration.
  • This stable octet configuration requires less energy to maintain than the corresponding atom.

So, since the stable octet configuration of the ion requires less energy than the corresponding atom, the statement is false.

So, the statement lons form because the loss of one or more electrons makes them less stable than their corresponding atoms; this state requires more energy to maintain is FALSE.

Learn more about ions here:

brainly.com/question/3631272

7 0
3 years ago
The first successful perpetual motion machine was invented in 1859.<br><br> True<br> OR<br> False
STALIN [3.7K]

Answer:

false

Explanation:

made in 12th centry

4 0
3 years ago
I really need help. Please
Oliga [24]

physical change

particles retain there composition and identity

there is no change in there chemical properties of the substance

the chemical changes should be the other two.

If it is wrong I'm truly sorry.

6 0
3 years ago
How do you prepare diluted acid from concentrated acid?
lidiya [134]
A dilute acid solution is prepared by adding the concentrated acid to water. If you do the reverse, i.e. add water to the acid it is possible that a small amount water could react with acid and boil and explode thus splashing the acid onto you or someone else near the activity. 
4 0
3 years ago
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