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Lyrx [107]
3 years ago
7

If an atom has 7 valence electrons, how many electrons does it need to gain to achieve a stable electron configuration?

Physics
2 answers:
Doss [256]3 years ago
6 0
It only needs one more to make it stable 
nydimaria [60]3 years ago
4 0
An even number of electrons so 1 electron plz give brainliest i rlly need it!!!
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Explain the energy changes involved when a positive charge moves because of a nearby, negatively charged object. use the terms e
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3 years ago
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A 6 m long, uniform ladder leans against a frictionless wall and makes an angle of 74.3 ◦ with the floor. The ladder has a mass
olganol [36]

Answer: µ=0.205

Explanation:

The horizontal forces acting on the ladder are the friction(f) at the floor and the normal force (Fw) at the wall. For horizontal equilibrium,

f=Fw

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ΣM = 0 = Fw*L*sin74.3º - (25.8kg*(L/2) + 67.08kg*0.82L)*cos74.3º*9.8m/s²

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Solve this for Fw.

0= 0.9637FwL - (67.91L)2.652

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f=186.81N

Since Fw=f

We know Fw, so we know f.

But f = µ*Fn

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Fn = (25.8 + 67.08)kg * 9.8m/s² =

910.22N

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3 years ago
What are some differences you can spot in a periodic table?
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"The position of each element in the table gives important information about its structure, properties, and behavior in chemical reactions. Specifically, an element's position in the periodic table helps you figure out its electron configuration, how the electrons are organized around the nucleus."

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When the temperature of the air is 50°C, the velocity of a sound wave traveling through the air is approximately?
noname [10]

The answer is:

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because of the variation of the motion of the molecules of air with change of temperature so, the velocity (V) of the  sound in the air is change with temperature.

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