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astraxan [27]
3 years ago
15

Identifying Physical and Chemical Chang

Chemistry
1 answer:
Burka [1]3 years ago
3 0
The answer is true because water and oxygen make up physical change
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What can be concluded from the following statements about a property of metats? • Acast-iron skillet on a stove is used to try b
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Answer:

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(5 points)
ExtremeBDS [4]

<u>Answer 2 :</u> The given electronic configuration for a neutral atom of phosphorous in its ground state is incorrect.

Explanation :

A neutral atom of phosphorous has 15 electrons.

The given electronic configuration is incorrect.

The reason is, According to Aufbau principle, the electrons will be first filled in the sub-shell having lower orbital energy. As from the given configuration, 3p sub-shell has lower orbital energy than 4s sub-shell. So, the electrons will be filled in 3p sub-shell first. Hence, the ground state electronic configuration of neutral atom of phosphorous is,

1s^22s^22p^63s^23p^3

<u>Answer 3 :</u>

Element                     Rubidium              Magnesium                Aluminium

Symbol                             Rb                         Mg                              Al

Group number                  1                             2                               13

Number of valence          1                             2                                3

electrons

The order of general reactivity on the basis of number of valence electrons.

Rb > Mg > Al

Reason : The reactivity is determined by the number of electrons present in the outermost shell that means the element which have 1 valence electron will be more reactive because they can easily lose electrons.

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If you subtract an objects starting velocity from its final velocity and divide by the time it took to change velocity, what are
amid [387]
Change in velocity over time is acceleration. 

You're finding acceleration . 
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Which of the following is the correct formula used for calculating Speed?
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Explanation:

Would make sense and that's what I remember

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Protons have about the same mass as:<br> A. electrons<br> B. neutrons<br> C. plasma particles
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Protons have the same mass as B. Neutrons. They have almost the same exact mass.
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3 years ago
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