Analyze: What do the elements in each column of the periodic table have in common?

Chlorine in group 17 in the periodic table and includes halogens (also fluorine, bromine, and iodine)

Electron configuration of Cl : [Ne] 3s² 3p⁵

From this configuration, it can be seen that to obtain stability like the noble gas Ar - [Ne] 3s² 3p⁶, Chlorine will need one more electron so that its configuration is the same as Ar( become anion-Cl⁻)

Then it is said that Cl is reactive

And the Cl element is included in the non-metal group because it attracts electrons (electronegative)

The elements that include non-metals are halogens, noble gases, and 7 elements H, C, N, O, P, S, Se.

Answer:

3 years

Explanation:

P= Rs 46875

R= 4 Pisa per rupee per year = 4% per annum

C. I = Rs 5853

t= time (the unknown)

Given;

Amount= P(1 + R/100)^t

Amount = (P + CI)

(46875 + 5853) = 46875 (1 + 4/100)^t

1.124864 = (1 + 4/100)^ t

1.124864 = (1.04)^t

t= 3 years

Answer:

Filtration separates solids of different sizes.

Evaporation removes a liquid from a solution to leave a solid material.

Explanation:

Have a nice day.

Answer:

B

Explanation:

a chemical change is something that can not be reversed, so you may think crushing a rock but it isn't because crushing a rock is a phisical change not chemical and if you freeze water you can melt it and of you melt ice you can freeze it, so those can be reversed. So the answer is B because that can not be reversed

Since new substances are formed in chemical changes, Lighting a Match is a chemical change., option B.

A chemical change refers to a change which is not easily reversible and in which new substances are formed.

In chemical changes, large amounts of heat is involved and changes in the mass of the original substance may occur.

Examples of chemical changes are combustion of substances, oxidation of substances, etc.

From the given options, the change which involves great heat changes and in which new sure are formed is Lighting a match.

Therefore, Lighting a match describes a chemical change, option B.

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Answer:

red

Explanation:

Answer:

The parts of an atom cannot be directly observed.

Explanation:

An atom is the smallest indivisible particle of a substance that can take part in a chemical reaction.

Atoms are not observed with naked eyes because they are found in the realm of very small particles. It is impossible to observe the parts of an atom directly.

As a result of this, models suffice in explaining the parts of an atom. Hence the answer.

Answer:

Rubidium belong to Alkaline group 1, and

Strontium belong to Alkaline group 2.

Explanation:

We know that elements are organized on the periodic table based on their properties.  The statement correctly predicting and explaining the chemical reactivity of two metals is given below -Rubidium (Rb) is more reactive than strontium (Sr) because strontium atoms must lose more electrons.

Answer:

11

Explanation:

Answer:

They are known as physical changes

Answer: I think d

Explanation:

Answer:

11 is the atomic number of alkali metal

Explanation:

The Group 1 elements are called the alkali metals. ... All the Group 1 elements are very reactive . They must be stored under oil to keep air and water away from them. Group 1 elements form alkaline solutions when they react with water, which is why they are called alkali metals.

Answer:

13.2 g Na2CO3

Explanation:

Convert 10.0 g NaOH to mol.

10.0 g x 1 mol/39.997 g = 0.250 mol

Use mol ration given by the equation: 2 mol NaOH to 1 mol Na2CO3

0.250 mol NaOH x 1 mol Na2CO3/2 mol NaOH = 0.125 mol Na2CO3

Finally, convert the moles of Na2CO3 to grams.

0.125 mol Na2CO3 x 105.99 g/1 mol = 13.2 g

According to stoichiometry,13.25 g of sodium carbonate is produced when 10 g of sodium hydroxide reacts with carbon dioxide.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

For the given reaction according to stoichiometry 2 molecules of sodium hydroxide react to  give 1 molecule of  sodium carbonate.

That is 80 g sodium hydroxide gives 106 g sodium carbonate

∴10 g sodium hydroxide will produce 10×106/80=13.25 g of sodium carbonate.

Thus, 10 g sodium hydroxide produces 13.25 g of sodium carbonate.

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Answer:

I cannot see any picture

Explanation:

Please put a picture

Answer:

sure what's the question

Explanation:

Answer:

A) measuring mass of metal used in a reaction

Explanation:

Quantitive observations is data involving statistics and numerical values.

Answer:

Catalytic cracking is an important process in the oil industry where petroleum vapor passes through a low-density bed of catalyst, which causes the heavier fractions to 'crack' producing lighter more valuable products

Thermal cracking is an extraction process in which hydrocarbons such as crude oil are heated to a high temperature to break the molecular bonds. Thermal cracking is a refining process in which heat and pressure are used to break down, rearrange, or combine hydrocarbon molecules.

Explanation:

Among electromagnetic waves, UV rays are most dangerous because exposure to these radiation cause serious problems in living organism. The wavelength of wave is 6.9x 10⁻⁸m.

Electromagnetic wave is a wave which contain two component one is electric component and other is magnetic component. The electric and magnetic component are perpendicular to each other. There are so many wave that comes under electromagnetic wave like infrared wave , radio wave, light wave.

There is a relation between frequency of wave, and wavelength of wave

Mathematically,

ν=c÷λ

where,

ν=frequency of light=4.34 x 10¹⁵s⁻¹

c is speed of light that is 3×10⁸m/s

λ is the wavelength of light=?

Substituting all the values

4.34 x 10¹⁵=3×10⁸m/s÷λ

λ= 3×10⁸÷4.34 x 10¹⁵

λ=6.9x 10⁻⁸m

Therefore,  the wavelength of wave is 6.9x 10⁻⁸m.

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Answer:

Freezing/Solidification

Throwing isn't classified as a force so I'd say C but it is a force just not a type

Answer:

C- throwing

Explanation:

You physically have to throw it while the other forces act on their own.

Answer:

3. a. I⁻

Explanation:

The charge of the ion is determined by which group (vertical on the periodic table) the element is in. Iodine is in the halogens and therefore is most likely to have a  1- charge.

Answer:

31

Explanation:

The resulting solution is composed of separate sodium ions and carbonate ions surrounded by water molecules.

Answer:

The amount left after 49.2 years is 3mg.

Explanation:

Given data:

Half life of tritium = 12.3 years

Total mass pf tritium = 48.0 mg

Mass remain after 49.2 years = ?

Solution:

First of all we will calculate the number of half lives.

Number of half lives = T elapsed/ half life

Number of half lives =  49.2 years /12.3 years

Number of half lives =  4

Now we will calculate the amount left after 49.2 years.

At time zero 48.0 mg

At first half life = 48.0mg/2 = 24 mg

At second half life = 24mg/2 = 12 mg

At 3rd half life = 12 mg/2 = 6 mg

At 4th half life =  6mg/2 = 3mg

The amount left after 49.2 years is 3mg.

Answer:

orbitals

Explanation:

Answer:

Iron (III) sulfate

Explanation:

Answer:

element:a,c

compound:f

mechanical mixture

solution:b

colloid:e

suspension:d

Explanation:

Answer:

The Internet started in the 1960s as a way for government researchers to share information. ... This eventually led to the formation of the ARPANET (Advanced Research Projects Agency Network), the network that ultimately evolved into what we now know as the Internet.

Explanation:

It is one of the most important factors that encourage workers to put forth great efforts and work more efficiently.