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drek231 [11]
3 years ago
10

What is an atom? Is it stable? Give reasons to support your answer.

Chemistry
1 answer:
Alex3 years ago
3 0
A stable atom is an atom that has enough binding energy to hold the nucleus together permanently. An unstable atom does not have enough binding energy to hold the nucleus together permanently and is called a radioactive atom.
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Which of the following is a characteristic of mixtures? A. Mixtures can only be in solid and liquid form. B. Substances that are
Taya2010 [7]

The correct choice is B.  

Mixtures retain their properties because science has proven it. Take a bag of trail mix for example. Those raisins and marshmallows and m&m’s can each be separated. When you take them out, they keep their same texture.  

 

Is not correct because mixtures can be solids (Trail mix is one example)  

Correct  

Is not correct because sometimes it cannot be seen (Lemonade powder and water is one example)  

Is not correct because trail mix is an example.

5 0
3 years ago
The oxidation number of all the element in free state is 0​
Art [367]

Answer:

Zero-Nine

Explanation:

this is becasue these numbers are rather small and if you plug these numbers into an equation you will most likely get 0.

8 0
3 years ago
Which substance is the oxidizing agent in this reaction? fe2o3+3co→2fe+3co2 express your answer as a chemical formula?
erma4kov [3.2K]
Equation is as follow,

                            Fe₂O₃  +  3 CO     →     2 Fe  +  3 CO₂

Oxidation:

                                        3 CO     →     3 CO₂

Oxidation state of C in CO is +2, and that in CO₂ is +4. So, carbon has lost 2 electrons per mole and 6 electrons per 3 moles hence,

                                 3 CO     →     3 CO₂  +  6 e⁻

Reduction:

                                    Fe₂O₃     →     2 Fe

Oxidation state of Fe in Fe₂O₃ is +3 per atom, and that in Fe is 0. So, Iron has gained 3 electrons per atom and 6 electrons per 2 atoms hence,

                                    Fe₂O₃  +  6e⁻     →     2 Fe

Result:
             Iron in Fe₂O₃ has been reduced in this reaction and has played a role of oxidizing agent by oxidizing carbon from +2 state to +4 state.
4 0
3 years ago
Which statement is generally true about CaCaI2 ?
erica [24]

Explanation:

"<em>Its bonds are formed by large differences in electronegativity" is the statement among the choices given in the question that is generally true about CaCl2.</em>

7 0
3 years ago
Define measurement. why is it important in our life?​
Fiesta28 [93]

Answer:

Measurements are so often taken for granted we sometimes do not appreciate the grand importance measurements play in our lives. On a baseline level, measurements fall into the categories of weight, area, volume, length and even temperature. While we look at these various categories as stoic forms of mathematical measurements a closer examination of things we do in everyday life reveals their clear importance.

Explanation:

Measurements provide structure and remove the chaos that would result without any congruent method of understanding weight, mass, temperature, etc.

4 0
3 years ago
Read 2 more answers
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