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Neporo4naja [7]

3 years ago

14

Which symbol represents an atom in the ground state with the most stable valence electron configuration?

2 answers:

qwelly [4]3 years ago

6 0

Answer: $Ne$

Explanation: The stable valence configuration is one in which the orbitals are completely filled as they are least reactive. Elements with partially filled valence shells are less stable and more reactive as they tend to gain or lose electrons to acquire stability.

$Boron:B:5:1s^22s^22p^1$

$Lithium:Li:3:1s^22s^1$

$Oxygen:O:8:1s^22s^22p^4$

$Neon:Ne:10:1s^22s^22p^6$

Anestetic [448]3 years ago

3 0

Ne is the symbol representing an atom in the ground state with the most stable valence electron configuration

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A single replacement reaction is a reaction in which one element replaces a similar element within a compound. True or false?

AleksAgata [21]

Answer:

true

Explanation:

A single replacement reaction is a reaction that an element is displaced with another element in a compound

A+BC------AC+B

Mg+2HCl-------MgCl2+H2

8 0

3 years ago

Why is the solvation energy negative?<br><br> a) bonds are being created<br> b) bonds are breaking

IrinaVladis [17]

Answer:

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3 0

3 years ago

Why does 10g Nitrogen gas contain the same number of molecules as 10 g of carbon monoxide

icang [17]

Answer:

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4 0

3 years ago

Read 2 more answers

Good morning, I have a question..

matrenka [14]

Answer:

<h3>The answer is 5.24 mL</h3>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

$volume = \frac{mass}{density} \\$

From the question

mass = 152 g

density = 29 g/cm³

We have

$volume = \frac{152}{29} \\ = 5.24137931...$

We have the final answer as

<h3>5.24 mL</h3>

Hope this helps you

7 0

3 years ago

A lead mass is heated and placed in a foam cup calorimeter containing 40.0 mL of water at 17.0°C. The water reaches a temperatur

lbvjy [14]

Answer: 502 Joules

Explanation:

To calculate the mass of water, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Density of water = 1 g/mL

Volume of water = 40.0 mL

Putting values in above equation, we get:

$1g/mL=\frac{\text{Mass of water}}{40.0mL}\\\\\text{Mass of water}=(1g/mL\times 40.0mL)=40.0g$

When metal is dipped in water, the amount of heat released by lead will be equal to the amount of heat absorbed by water.

$Heat_{\text{absorbed}}=Heat_{\text{released}}$

The equation used to calculate heat released or absorbed follows:

$q=m\times c\times \Delta T$

q = heat absorbed by water

$m$ = mass of water = 40.0 g

$T_{final}$ = final temperature of water = 20.0°C

$T_{initial$ = initial temperature of water = 17.0°C

$c$ = specific heat of water= 4.186 J/g°C

Putting values in equation 1, we get:

$q=40.0\times 4.186\times (20.0-17.0)]$

$q=502J$

Hence, the joules of heat were re-leased by the lead is 502

5 0

3 years ago