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sveta [45]
4 years ago
12

I’m the periodic table of elements, what do all of the elements in group 2 have in common

Chemistry
2 answers:
Alex Ar [27]4 years ago
7 0

Answer:  Two electrons present in the outermost shell.

Explanation:  Group 2 elements of the periodic table are known as Alkaline Earth Metals . The elements are Beryllium(Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium(Ba) and Radium (Ra).

The below mentioned properties of the group 2 are common in all the elements-

a) they all are shiny and silvery white metals.

b) they all have 2 electrons in its outermost shell thus mostly exist in +2 oxidation state.

c) they are less reactive than alkali metals.

d) they are relatively soft and have low density.

scZoUnD [109]4 years ago
5 0

Group 2 elements are also known as Alkyline Earth Metals.

Alkyline Earth Metals share these properties:

  • Have only two valence electrons
  • Shiny
  • Reactive
  • Low ionization energy
  • Do not exist in elemental forms in nature

Hope this helps!

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Which choices are layers of the atmosphere?
slavikrds [6]

Answer:

Mesosphere

Stratosphere

Thermosphere

Troposphere

Exosphere

Explanation:

The exosphere refers to the farthest region of the atmosphere that gradually fades into space.

The troposphere is the lowest layer of atmosphere. It is the layer where weather changes occur.

The thermosphere is right above the mesosphere but just below the exosphere. It is the layer where photoionization/photodissociation of molecules occurs thereby creating ions. This largely owes to interaction of molecules in this layer with ultraviolet radiation.

The stratosphere is composed of gases. Prominent among them is ozone which serves as a blanket against the sun's ionizing radiation.

The mesosphere lies above the stratosphere but just below the thermosphere. Temperature decreases steadily with height in the mesosphere.

8 0
3 years ago
White light shines on a piece of paper whose atoms are capable of absorbing orange, indigo, violet, yellow, red, blue, and green
hram777 [196]

Answer:

I think the color of the paper is Black.Am I right?

5 0
3 years ago
Which practice is an unsustainable way of managing resources?
Sergeeva-Olga [200]

Explanation:

Unsustainable way of managing resources means using resources in an unjustifiable manner, using without keeping in the needs for future generations. That is disobeying the principles of sustainability.

For examples release of toxic industrial wastes in rivers and thus, polluting it. Or, Deforestation of land for agricultural or industrial purposes. Thus, reducing the oxygen carrying capacity of Earth.

7 0
3 years ago
How many total atoms are in 0.530 g of P2O5/12131141/dc2696ff?utm_source=registration
Lyrx [107]
In order to calculate the number of atoms present in 0.53 grams of P₂O₅, first calculate the number of moles for given mass.

As, Moles is given as,

                             Moles  =  Mass / M.mass

                             Moles  =  0.53 g ÷ 283.88 g.mol⁻¹

                             Moles  =  0.00186 moles

Now calculate the number of Molecules present in calculated moles of P₂O₅.

As,
                        1 Mole of P₂O₅ contains  =  6.022 × 10²³ Molecules
So,
             0.00186 Moles of P₂O₅ contain  =  X Molecules

Solving for X,
                        X  =  (0.00186 mol × 6.022 × 10²³ Molecules) ÷ 1 mol

                        X  =  1.12 × 10²¹ Molecules

Also, in P₂O₅ there are 7 atoms, in 1.12 × 10²¹ Molecules there will be.....

                            = 1.12 × 10²¹ × 7

                            =  7.84 × 10²¹ Atoms
Result:
            
7.84 × 10²¹ Atoms are present in 0.53 grams of P₂O₅.
8 0
3 years ago
When supply and demand for a product increase simultaneously, we can predict that both the market clearing price and the equilib
Whitepunk [10]

Answer: Explanation:

When supply and demand for a product increase simultaneously, we cannot predict the market clearing price, but know that the equilibrium quantity will increase.

NB: We cannot predict the market clearing price because no adequate information such as government policy is provided. such information would likely affect the market clearing price either positively or negatively.

P.S: This is a business question.

3 0
3 years ago
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