Chemistry, 29.07.2019 15:50 hdhdhd49jdhd

The atomic number of beryllium (be) is 4, and the atomic number of barium (ba) is 56. which comparison is best supported by this information? they are in the same group because they have similar atomic masses, but they are in different periods because they have different chemical properties. they are in the same group because they have similar chemical properties, but they are in different periods because they have very different atomic numbers. they are in the same group because their atomic numbers are each multiples of four, but they are in different periods because they have different chemical properties. they are in the same group because they have similar atomic masses, but they are in different periods because they have very different atomic numbers.

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They are in the same group because they have similar chemical properties, but they are in different periods because they have very different atomic numbers.

Both Be and Ba are in the group two of the periodic table: they are alkaline earth metals.

They, then are in the same group because they have similar chemical properties. Of course they have different atomic numbers, because each atomic number is unique.

When you make the electron distribution of those elements you get:

Be: [He] 2s^2

Ba: [Xe] 6s^2

It is the valence electron shell with two electrons (s^2) what explains their chemical similarity.

Answer from: lalalalal5

I know that it is b

(I just took this)

Answer from: Quest

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

Write 15 uses of a mercury barometer along with its characterestics

Answer from: Quest

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

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The atomic number of beryllium (be) is 4, and the atomic number of barium (ba) is 56. which comparis...

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