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3 years ago

Which choice has the element groups in the correct order. from left to right on the periodic table?

1 answer:

3 0

Since you did not include the choices, I am going to teach you the order of all the groups from letf to right on the periodic table.

The order from let to right is 1, 2, 3, 4, ...., 13, 14, 15, 16, 17, 18.

Group    Family

1            Alakalyne metals is the group at the left end.

2           alkakalyne earth metals, is the next group from left to right

3 to 12    transition metals
        3     scandium family
        4     titanium family
        5     vanadium family
        6     chromium family
        7     manganese family
        8     iron family
        9     cobalt family
       10    niquel family
       11    copper family (aka coinage metals)
       12    zinc family (aka volatile metals)

13           boron family, aka icosagens

14            carbon family, aka crystallogens

15            nitrogen family, aka pnictogens

16            oxygen family, aka chalcogens

17            halogens

18            noble gases: is the group at the right end.

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To solve this exercise it is necessary to use the concepts related to Difference in Phase.

The Difference in phase is given by

$\Phi = \frac{2\pi \delta}{\lambda}$

Where

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From our values we have,

$\lambda = 500nm = 5*10^{-6}m$

$\theta = 1\°$

The horizontal distance between this two points would be given for

$\delta = dsin\theta$

Therefore using the equation we have

$\Phi = \frac{2\pi \delta}{\lambda}$

$\Phi = \frac{2\pi(dsin\theta)}{\lambda}$

$\Phi = \frac{2\pi(5*!0^{-6}sin(1))}{500*10^{-9}}$

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Therefore the correct answer is C.

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3 years ago

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You have traveled 390 km. In order to find your answer all you have to do is multiply your speed which is 130 km/h by 3 hrs. That's my friend is how you get your answer! Have a great day!

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4 years ago

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Below are the choices that can be found elsewhere:

A. (4.9 × 10-14 newtons) · tan(30°)
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D. (4.9 × 10-14 newtons) · arctan(30°) 
E. (4.9 × 10-14 newtons) · arccos(30°)

Force is proportional to the angle made by the velocity with respect to the magnetic field. It is maximum when velocity is perpendicular to the magnetic field and minimum when the velocity is parallel to the magnetic field. It is proportional to sin of the angle. In this problem it will be proportional to sin(30)

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Read 2 more answers

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