Which group will have an electron configuration that ends in s2?

a
Alkali metals (Group 1)
b
Halogens (Group 17)
c
Alkaline earth metals (Group 2)
d
Noble gases (Group 18)

Answer:

Therefore both Principal quantum number (n) and angular momentum quantum number (1) are responsible to energy level of an orbital in a multi electron atom.

Explanation:

Hope this helps.

Answer:C, 0.746 mol Ag.

1 mol Ag = 6.022 x 1023 atoms of Ag -> 4.49 x 1023 atoms of Ag x 1mol Ag/6.022 x 1023 atoms -> 0.746 mol Ag

Explanation:

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore,  0.746 mol of Ag contain 4.49 x 10²³ atoms Ag.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample. There are so many formula for calculating mole.

we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number

mole =given number of atoms ÷ 6.022×10²³(Avogadro number)

given number of atoms of Ag=4.49 x 10²³ atoms

Substituting the values

mole= 4.49 x 10²³ ÷ 6.022×10²³

mole =  0.746 mol

Therefore,  0.746 mol of Ag contain 4.49 x 10²³ atoms Ag.

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Answer:

covalent....................

Answer:

Is it Crucible,Test tube,Dropper,Filter funnel, Spatula

Explanation:

The laboratory apparatus is used to experiment with the chemicals and to hold them. To prepare and investigate the pH of the onion sample apparatus required are the crucible, test tube, dropper, filter funnel, and spatula.

pH is the measurement of the hydrogen or the hydroxide ion concentration in the solution to determine the alkaline or acidic nature of the substance.

The pH of the onion solution can be determined by experimenting with the help of the laboratory apparatus and reagents. A crucible is a container that can withstand high temperatures.

A test tube is a glassware used to hold the substance or chemical in it. Similarly, a dropper is used to draw liquids. The filter funnel separates the filtrate or the solution. A spatula can  be used to remove or add the substance.

Therefore, the correct order of the apparatus is the crucible, test tube, dropper, filter funnel, and spatula.

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Answer:

..

...

....

Explanation:

hop it helps.....

equation: Iron + Sulfuric acid → Iron (II) sulfate + hydrogen gas

Type of Chemical Reaction: For this reaction we have a single displacement reaction.

Note that this is the chemical reaction that takes place when diluted Sulfuric acid reacts with iron. If you have concentrated Sulfuric acid you will have a different equation.

An atom ion and isotope of an element have in common that both have the same number of protons but they have different numbers of neutrons.

An ion is a charged atom while an isotope is the atoms of an element with the same atomic number but different atomic mass.

For example; Mg2+ is the ionic form of Magnesium while C-12 and C-14 are isotopes of carbon.

Here the ion of an atom will have a different charge but the same mass.

Also The isotope of an atom will have a different mass.

The number of protons V/S the more general atom, an ion has a different number of electrons, and an isotope, a different number of neutrons.

Hence atom ion and isotope of an element have in common that both have the same number of protons but they have different numbers of neutrons.

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Answer:

there would be not movement.

Answer:

First, each element that forms cations is a metal, except for one (hydrogen), while each element that forms anions is a nonmetal. This is actually one of the chemical properties of metals and nonmetals: metals tend to form cations, while nonmetals tend to form anions. Are positive ions metals or nonmetals?

Explanation:

Answer: calorimetry

Explanation: calorimetry: the measure of the amount of heat involved in a chemical or physical process.

Answer:

CH3COOH+NAOH=.>CH3COONA+H20

Explanation:

1. is Igneous rock

2. is underneath Earths surface

3. is Coarsed-grained

hope this help!!^^

The kind of rocks is igneous rocks formed along the sides of volcano  and are coarsed-grain rocks.

Igneous rocks are one of the three main rock types the other two including sedimentary and metamorphic rocks.These rocks are formed by cooling and solidification of lava or magma.

The magma is derived from partial melts in the planet's mantle or crust.Melting is caused by increase in temperature or decrease in pressure or even change in composition.Solidification occurs either below surface which is called as intrusive rocks or on the surface as extrusive rocks.

They are classified according to their texture,mode of occurrence,chemical composition,geometry and mineralogy of rock.The two important variables for classification are mineral composition and cooling history.

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2 moles of HCl solution reacts with one mole Calcium Hydroxide

Ca

(

O

H

)

2

One mole of HCl has mass : 36.5 g/mol, two moles of HCl will have mass, 73 g.

One mole of Ca

(

O

H

)

2

has mass 74.1 g

as per equation; 73 g of HCl reacts with 74.1 g of Ca

(

O

H

)

2

1g of HCl reacts with 74.1g / 73 of Ca

(

O

H

)

2

1g of HCl reacts with 1.015 g of Ca

(

O

H

)

2

Answer:

Dissolving the mixture in water, filtering and then perform evaporation on the filtrate

Explanation:

To determine the molarity, we have to find the number of moles in the volume given, and then extrapolate to find the number of moles that would be in 1 L.

Determine the moles in the given volume

moles of LiCl = mass ÷ molar mass

                       = 139.9 g ÷ 42.39 g/mol

                       = 3.30 mol

Find the moles in 1 L

    Since 930 mL of LiCl    =   3.30 mol

    then 1000 mL of LiCl    =   (3.30 mol × 1000 mL/L) ÷ 930 mL

                                           =  3.55 mol/L

Answer:

Observe: To model how hydrogen and oxygen react to make water, type “H2+O2” into the Reactants box and “H2O” into the Products box.

As the equation is written, which element is not in balanced?

oxygen isn't balanced...

Explanation:

in reactants there is 2hydrogens and 2 oxygen

but in product there is balanced no if hydrogen bt there is only one no of oxygen

Answer:

A transition from one accepted theory to another or from one employed method to another.

Explanation:

"Density is a characteristic property of water because the density of any sample of water (at the same temperature) is always the same. The density is 1 g/cm3." - Mazza

Answer:

Quantitative experiments show that 4.18 Joules of heat energy are required to raise the temperature of 1g of water by 1°C. Thus, a liter (1000g) of water that increased from 24 to 25°C has absorbed 4.18 J/g°C x 1000g x 1°C or 4180 Joules of energy.

Answer:

destruction of protein bonds

Explanation:

bleach dyes the hair by opening the hair cuticle and dissolving the color (melanin). The longer you leave it on, the more the protein bonds (keratin) are destroyed.

The heat denatures the protein in the egg by disrupting some of its weak bonds that held the molecule into shape

Answer:

18.51g/cm³

Explanation:

Mass=50.0g

Density =2.7g/cm³

Volume =Mass/Density

Volume =50/2.7

Volume =18.51g/cm³

Answer:

By putting the liquid water in the fridge

Explanation:

When it is solid the heat will melt to liquid water and if you put it inside a boiling kettle if it boil finished it will bring out gas,if you open it the cover of the kettle you see water if you put it in the fridge and it will be solid again.

Answer:

So the asnwer is 66666666666666666666666666666666666666666666666666666666666666666666666666666666666668888844444444444444444443299997832........................................................4563ygfdjuzgu3456655555555555555555555553444446445444444555554

Explanation:

1. matter

2. oxygen

3. water

4. hydrogen

5. compound

hope it helps :)

Answer:

9.13 x 10^-8 m

Explanation:

The maximum wavelength of photon that will eject a ground state electron from a hydrogen atom is 9.18 * 10^-8.

Wavelength is defined as the distance between identical points in the adjacent cycle of a waveform signal propagated in space or along the wires.

Wavelength is calculated as wave speed and frequency.

Wavelength = speed/frequency

SI unit of wavelength is meter.

A ground state atom is an atom in which total energy of the electron can not be lowered by transferring one or more electrons to different orbitals.

Thus, the maximum wavelength of photon that will eject a ground state electron from a hydrogen atom is 9.18 * 10^-8.

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Answer: This means that the color of light with a higher frequency will have a lower wavelength and valence electron energy level.

Explanation: