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3 years ago

Groups of the periodic table correspond to elements with:

Physics

2 answers:

Paladinen [302]3 years ago

8 0

Answer;

C. Similar chemical properties

Explanation;

-The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.

-For example; all of the 1A elements have one valence electron. This is what causes these elements to react in the same ways as the other members of the family. They are all very reactive and form compounds in the same ratios with similar properties with other elements. Because of their similarities in their chemical properties, these elements are in the same group. These elements are called alkali metals.

Aleks04 [339]3 years ago

6 0

The same atomic number. The periodic table assembles all of the recognized elements appropriate increasing atomic number. Order usually accords with increasing atomic mass. The number of electrons in a period rises as one it moves down the periodic table; so, as the energy level of the atom rises, the number of energy sub-levels per energy level rises.

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Temperature can be described as ________

Agata [3.3K]

Temperature can be described as an indirect measure of heat energy
So therefore your answer should be letter C

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3 years ago

As a pendulum swings back and forth_____________.

Nookie1986 [14]

Answer:e

Explanation:

As the Pendulum swings back and forth its kinetic energy is converted into potential and Potential into kinetic .

At highest point Pendulum is momentarily at rest and thus possess all the energy in the form of Potential Energy which is converted into kinetic energy as the pendulum moves downward.

The kinetic energy is maximum at mean position i.e. at lowest point.

Thus all of the given options are true

8 0

4 years ago

Which of the following is an example of an electromagnetic wave?

PtichkaEL [24]

Answer:

red light light is an electromagnetic wave thats whyy

hope it helped

Explanation:

4 0

2 years ago

Be sure to answer all parts. Without stratospheric ozone (O3), harmful solar radiation would cause gene alterations. Ozone forms

Ratling [72]

Answer:

for C-Cl bond $\lambda_1=3.66\times 10^{-9}\ m$

for O-O bond $\lambda_2=2.43\times 10^{-9}\ m$

Explanation:

We have the bond enegy for C-Cl, $BE_1=327\ kJ.mol^{-1}= 327000\times 1.66\times 10^{-22}\ J\ per\ molecule$

bond enegy for C-Cl, $BE_2=494\ kJ.mol^{-1}= 494000\times 1.66\times 10^{-22}\ J\ per\ molecule$

Now as we know the energy of electromagnetic waves is given by:

$E=h.\nu$

here E = BE

Then for C-Cl:

$327000\times 1.66\times 10^{-22}=6.63\times 10^{-34}\times \nu_1$

$\nu_1=8.18733\times 10^{16}\ Hz$

Now wavelength:

$\lambda_1=\frac{c}{\nu_1}$

$\lambda_1=\frac{3\times 10^8}{8.18733\times 10^{16}}$

$\lambda_1=3.66\times 10^{-9}\ m$

For O2:

$494000\times 1.66\times 10^{-22}=6.63\times 10^{-34}\times \nu_2$

$\nu_2=1.236863\times 10^{17}\ Hz$

Now wavelength:

$\lambda_2=\frac{c}{\nu_2}$

$\lambda_2=\frac{3\times 10^8}{1.236863\times 10^{17}}$

$\lambda_2=2.43\times 10^{-9}\ m$

8 0

3 years ago

A kingfisher bird that is perched on a branch a few feet above the water is viewed by a scuba diver submerged beneath the surfac

andrew11 [14]

Answer:

The bird appears farther

Explanation:

This is because as the light from the bird travels into the water which has a higher refractive index than air, light rays from the kingfisher bird bend towards the normal at the water surface and thus enter the eye of the scuba diver. Now, if we project the light rays from the eyes of the scuba diver into the air, we see that they appear to come from a point farther than that of the actual kingfisher bird perched on the branch.

So, the bird appears to the diver to be farther from the surface than the actual bird

3 0

3 years ago