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antoniya [11.8K]
2 years ago
13

Because atoms are electrically neutral, the number of protons and _____ in an atom are equal.

Chemistry
1 answer:
Misha Larkins [42]2 years ago
5 0

Answer: I believe that it's electrons please let me know if it was right or what it was!

Hope this helps!!! Good luck!!! ;)

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Which property is not characteristic of a metal?
skelet666 [1.2K]
Hey there,
The answer is B, brittleness

Hope this helps :))

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7 0
3 years ago
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Which subatomic particles have a mass of approximately 1 atomic mass unit each?
Sedbober [7]
Great question! The subatomic particles that have most of the mass in the particle are the positive proton, and the neutral neutron. Therefore, protons and neutrons are the two subatomic particles have approximately 1 atomic mass unit each.
5 0
3 years ago
Which elements have the most similar chemical properties?
Mumz [18]

Answer: K and Na

Explanation:

Potassium and Sodium have a chemical symbol of K and Na respectively.

They have similar chemical properties because both

- have only one valence electron,

- form univalent positive ion when they donate their lone outermost electron as shown below

Na --> Na+ + e-

K --> K+ + e-

- are good reducing agents

- react with cold water vigorously to liberate hydrogen gas and form alkalis, so they are known as alkali metals.

- K and Na are placed in Group 1 of the periodic table.

Thus, unlike the other pairs given, K and Na, have the most similar chemical properties

6 0
3 years ago
What is saturated solution and how it is prepared
Dimas [21]
Hope my answer helped you
5 0
3 years ago
PLEASE SOMEONE HELP ME WITH THIS!
Bad White [126]

Answer:

1) 1.202 L , 2) 1.291 dg , 3) 204.877  and 4) 1.04x10^{3\\}

Explanation:

You need to review about conversion factors and how to use them in the correct order. You can cancel the units and get the ones that you need if you use the appropriate conversion factors, remember is a number that you can use to multiply or divide.

For your exercise:

1) The conversion factor is: 1 L = 1000 mL

You will need to divide by 1000 mL to obtain liters L

1202.57120 mL x  \frac{1 L}{1000 mL} = 1.202 L

2) The conversion factor is: 1 g = 10 dg

0.1290743 g x \frac{10 dg}{ 1 g} = 1.291 dg

For the next exercises, you need to follow some rules:

1.  All numbers  that are different from Zero (non-zero digits) are significant figures.

2.The Zeros between non-zeros digits (Imbedded zeros) always are significant, 2007.

3. If you want to be specific and want some zeros to be significant you need to add a decimal point. For example 500. or 500.0

4. Leading zeros (to the left) are not significant.

5. Trailing zeros (zeros to the right) in a whole number without decimal point are not significant.

3) 843.062  - 638.1848  = 204.8772

Now if we round to 6 significant figures we get 204.877

4)123.0 x 8.43 = 1036.89

Now we round to 3 significant figures because 8.43 has the least significant figures.  

1.04x10^{3}

4 0
3 years ago
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