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3 years ago

Advantages of modern periodic table

Chemistry

1 answer:

spayn [35]3 years ago

8 0

Answer:

It organizes all of the elements and it allows you to easily find the groups of elements such as

Group 1 of the periodic table consists of hydrogen and the alkali metals

Group 2 consists of the alkaline metals (batteries!)

Groups 3–12 contain transition metals

Groups 13–16 each contain at least one metalloid

Group 17 contains halogens

Group 18 consists of noble gases which are stable.

It is easy to read and theres a song to help you memorize them online.

Explanation:

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Describe what atoms are.

umka21 [38]

Answer:

the smallest component of an element having the chemical properties of the element

5 0

4 years ago

The balanced chemical equation, Zn (s) + 2 HCl (aq) ZnCl2 (aq) + H2 (g), can be expressed in words as: Answer Zirconium metal pl

klio [65]

choices are:

Zirconium metal plus hydrogen chloride yields zirconium chloride solution and hydrogen gas

Xenon solid plus hydrochloric acid yields xenon chloride and hydrogen gas

Zinc metal plus hydrogen chloride yields zinc dichloride plus hydrogen gas

Zinc metal plus an aqueous solution of hydrochloric acid yields an aqueous solution of zinc chloride plus hydrogen gas

right ans is:

Zinc metal plus an aqueous solution of hydrochloric acid yields an aqueous solution of zinc chloride plus hydrogen gas

3 0

3 years ago

Read 2 more answers

What is effective nuclear charge?

Amiraneli [1.4K]

Answer:

The effective nuclear charge (often symbolized as Zeff or Z*) is the net positive charge experienced by an electron in a multi-electron atom. The term “effective” is used because the shielding effect of negatively charged electrons prevents higher orbital electrons from experiencing the full nuclear charge.

Explanation:

6 0

3 years ago

PLEASE HELP I AM FAILING

Gwar [14]

Answer:

160.3 g S

Explanation: there you go

5 0

3 years ago

4. A 0.100 M solution of NaOH is used to titrate an HCl solution of unknown concentration. To neutralize the solution, an averag

PtichkaEL [24]

Answer:

C. 0.191 M

Explanation:

Our goal for this question, is to calculate the concentration of the HCl solution. For this, in the experiment, a solution of NaOH was used to find the moles of HCl. Therefore, our first step is to know the reaction between HCl and NaOH:

$HCl~+~NaOH~->~NaCl~+~H_2O$

The "titrant" in this case is the NaOH solution. If we know the concentration of NaOH (0.100M) and the volume of NaOH (38.2 mL=0.0382 L), we can calculate the moles using the molarity equation:

$M=\frac{mol}{L}$

$0.100~M=\frac{mol}{0.0382~L}$

$mol=0.100~M*0.0382~L=0.0382~mol~of~NaOH$

Now, in the reaction, we have a 1:1 molar ratio between HCl and NaOH (1 mol of HCl is consumed for each mole of NaOH added). Therefore we will have the same amount of moles of HCl in the solution:

$0.0382~mol~of~NaOH\frac{1~mol~HCl}{1~mol~NaOH}=0.0382~mol~HCl$

If we want to calculate the molarity of the HCl solution we have to divide by the litters of HCl used in the experiment (20 mL= 0.02 L):

$\frac{0.0382~mol~HCl}{0.02~L}~=~0.191~M$

The concentration of the HCl solution is 0.191 M

I hope it helps!

8 0

3 years ago

Advantages of modern periodic table​

Advantages of modern periodic table