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enot [183]
3 years ago
7

If an atom has a mass number of 25 and an atomic number of 11 how many neutrons are there in this atom?

Chemistry
1 answer:
babunello [35]3 years ago
5 0
C. 14
you would subtract the mass number from the protons or the atomic number because in order to find the mass number you would add the protons and neutrons :)
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Group-8 elements are inert and possess
Artemon [7]

Answer:

Group 8 elements are inert and possess :

1. Low Boiling Points

2. High ionization energies

3. Electronegativities is very low

4. No color, odor

Explanation:

Group 8 elements are also called as Noble Gases. They are unreactive.

They have low boiling points means they remains monoatomic  at room temperature.  Having high ionization energy means that it is very difficult to remove an electron from its valence shell.

3 0
4 years ago
Briefly explain Potassium with 19 protons and 19 neutrons
Igoryamba

Answer: Group  

1  

Melting point  

63.5°C, 146.3°F, 336.7 K  

Period  

4  

Boiling point  

759°C, 1398°F, 1032 K  

Block  

s  

Density (g cm−3)  

0.89  

Atomic number  

19  

Relative atomic mass  

39.098    

State at 20°C  

Solid  

Key isotopes  

39K  

Electron configuration  

[Ar] 4s1  

CAS number  

7440-09-7  

Explanation:

8 0
4 years ago
If the pressure of a 2.3 mole sample of gas is initially 1.5 atm, the volume is
andreyandreev [35.5K]
Answer: last one
300 L
I hope this helps you
7 0
3 years ago
Which of the following is an example of a mixture?
valentinak56 [21]
A. The atmosphere

All the other examples are either elements or compounds, not mixtures. A mixture is a combination of elements that are not chemically or irreversibly conjoined so the atmosphere, made up of a variety of gases, would be a mixture.
5 0
3 years ago
When metals combine with nonmetals, the metallic atoms tend to 1. lose electrons and become positive ions 2. lose electrons and
Vika [28.1K]
The correct answer is 1. Lose electrons and become positive ions.


I hope my answer was beneficial to you! c:
5 0
3 years ago
Read 2 more answers
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