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Lerok [7]
3 years ago
9

Electrons are added into the outermost what in groups 1 & 2

Physics
1 answer:
aivan3 [116]3 years ago
3 0

S orbital.

Group 1 elements have a general configuration ns^{1}, where n represents the highest occupied Principal Energy Level. For example, Lithium has the valence configuration 2s^{1} whereas Cesium has 6s^{1}. Both of them belong to Group 1 of Periodic Table.

Group 2 elements have a general configuration of ns^{2}. For example, Magnesium has 3s^{2} as its outer shell configuration while Strontium has the same as 5s^{2}.

We see that in both the cases, the outermost S orbital is being filled.

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Sholpan [36]

I haven't worked on Part-A, and I don't happen to know the magnitude of the gravitational force that the Sun exerts on the Earth.  

But whatever it is, it's exactly, precisely, identical, the same, and equal to the magnitude of the gravitational force that the Earth exerts on the Sun.

I think that's the THIRD choice here, but I'm not sure of that either.

4 0
3 years ago
2. A small piece of dust is located in between two oppositely charged parallel plates where there exists a uniform electric fiel
Alla [95]

Answer:

a

The total charge is q = 1.6*10^{-4}C

b

The change in potential energy is \Delta U = -4*10^{-2}J

c

The height is  h= 8.2cm

Explanation:

From the question we are told that the

       The magnitude of electric field is E = 5000N/C

        The number of proton is  N_p = 1*10^{15}

        The distance between the plates is  d = 5cm = \frac{5}{100} = 0.05m

The total charge can be mathematically represented as

            q = N_p * e

Where e is the charge on one proton which has a value of =1.6*10^{-19}C

      Substituting values

           q = 1 *10^{15} * 1.6*10^{-19} = 1.6 *10^{-4}C

The change in potential energy is mathematically represented ads

         \Delta U = -(qE)d

where the negative sign shows that the work done by the electric force is against the electric field

                Substituting values

         \Delta U = - 1.6*10^{-4} * 5000 * 0.05

                = -4*10^{-2}J

 

   The mass of the bead is given as 0.05kg

  The change in potential due to gravity is mathematically given as

                    \Delta U = -mgh

the negative sign is  due to the fact that the height is decreasing

And g =9.8m/s^2

                  Making h the subject

        h = \frac{\Delta U}{mg}

Substituting values

                 h = \frac{4*10^{-2}}{0.05 * 9.8}

                   =0.081m = 0.082 *100 = 8.2cm

4 0
4 years ago
Name and state the rule to find out the direction of magnetic field inside and around the loop.
goldfiish [28.3K]

Answer:

The right hand rule states that: to determine the direction of the magnetic force on a positive moving charge, ƒ, point the thumb of the right hand in the direction of v, the fingers in the direction of B, and a perpendicular to the palm points in the direction of F.

Explanation:

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3 years ago
Which pm the following are likely to form a covalent bond
Alecsey [184]

Answer:

magneisuim and gold

Explanation:

8 0
4 years ago
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If the density of pure copper is 8.89g/cm3(at 20•c),calculate the volume of a copper brick with a mass of 4.5kg
oksano4ka [1.4K]

The volume of a substance can directly be calculated by the ratio of mass and density. That is:

volume = mass / density

 

Since the mass is 4.5 kg or 4500 grams, therefore:

volume = 4500 g / (8.89 g / cm^3)

<span>volume = 506.19 cm^3</span>

8 0
3 years ago
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