1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Flauer [41]
3 years ago
15

Please fill out completely for my understanding. Thank-You!

Chemistry
1 answer:
Archy [21]3 years ago
8 0

The atomic number,atomic mass,valence electrons and the formula for calculating the number of neutrons is also given.The following table has been completed below in the attachment.

Explanation:

Atomic Number:the number of protons /electrons present in the nucleus of an atom is called the atomic number.

Mass Number/Atomic Mass:the number of protons and neutrons present in a nucleus

<u>Example:</u>C_{6} ^{12};here;6 implies the atomic number and 12 implies the mass number/atomic mass

<u><em>No.of neutrons=Mass number-Number of protons</em></u>

Valence electrons:the number of electrons present in the outer most shell of an atom are called valence electrons

<u>Example:</u>If we consider a carbon atom;as its <em>e</em><em>lectronic configuration is2,4 and</em>  it belongs to 4th group.Therefore the number of valency electrons in carbon is <u>4.</u>

You might be interested in
Calculate the mass of water produced when 7.26 g of butane reacts with excess oxygen
MaRussiya [10]

Answer:

11.3 g.

Explanation:

Hello there!

In this case, since the combustion of butane is:

C_4H_{10}+\frac{13}{2} O_2\rightarrow 4CO_2+5H_2O

Thus, since there is a 1:5 mole ratio between butane and water, we obtain the following mass of water:

m_{H_2O}=7.26gC_4H_{10}*\frac{1molC_4H_{10}}{58.14gC_4H_{10}}*\frac{5molH_2O}{1molC_4H_{10}}  *\frac{18.02gH_2O}{1molH_2O}

Therefore, the resulting mass of water is:

m_{H_2O}=11.3gH_2O

Best regards!

4 0
2 years ago
What is the position of an element in the periodic table if its electron configuration is 1s2 2s2 2p6 3s2 3p5
OlgaM077 [116]
The element in the periodic table with the provided electron configuration is Chlorine. Cl it is found as in element in Group 7 of the periodic table.
4 0
3 years ago
Read 2 more answers
Explain the difference between chemical properties and physical properties. Give an example if each
Gelneren [198K]
Chemical property is when it's observed during a reaction in which the chemical composition or identity of the substance is changed. physical properties is when properties that do change the chemical nature of matter.
example for this is smell, color, freezing point, etc.
8 0
3 years ago
What NaCl NaCl concentration results when 249 mL 249 mL of a 0.850 M 0.850 M NaCl NaCl solution is mixed with 667 mL 667 mL of a
tamaranim1 [39]

Answer:

The answer to your question is 0.54M

Explanation:

Data

Final concentration = ?

Concentration 1 = 0.850 M

Volume 1 = 249 ml = 0.249 l

Concentration 2 = 0.420 M

Volume 2 = 0.667 M

Process

1.- Calculate the number of moles in both solutions

Number of moles 1 = Molarity 1 x Volume 1

                               = 0.850 x 0.249

                               = 0.212

Number of moles 2 = Molarity 2 x Volume 2

                                = 0.420 x 0.667

                                = 0.280

Total number of moles =  0.212 + 0.280

                                      = 0.492

2.-Calculate the final volume

Final volume = Volume 1 + Volume 2

Final volume = 0.249 + 0.667

                      = 0.916 l

3.- Calculate Molarity

Molarity = 0.492 / 0.916

Molarity = 0.54

4 0
3 years ago
Exercise 4: Gas under 200 kPa of pressure at a temperature of 120 K fills a 0.5 L container. If the temperature decreases to 80
nordsb [41]

Answer:

Briggs is planning to make abatch of home made play dough for an art projections

6 0
2 years ago
Other questions:
  • A sample of an uranium compound is found to be losing mass gradually. Explain what is happening to the sample.​
    14·1 answer
  • How demanding is lime and cement in our world's economy?
    7·1 answer
  • Which of these do not obey the octet rule? select all that apply. select all that apply. clo clo− clo2− clo3− clo4−?
    6·2 answers
  • For each pair of ions, choose the one that has the smaller radius.  Na+ or Mg2+  Cl- or K+
    15·1 answer
  • A science club made pine wood cars. Each car was set on the same track and then released. The distance traveled was measured. Li
    9·1 answer
  • Most people like to go outside on a sunny day, but too much sun exposure can cause sunburns as well as long term health problems
    12·2 answers
  • A truck traveled at a constant speed for 6 hours. Then, it
    12·2 answers
  • 14. Have your thoughts about the Great Pacific Garbage Patch changed since we first talked about it earlier in the year? Do you
    5·1 answer
  • A mixture of sodium hydroxide and strontium hydroxide contains a total of 0.19 moles of the two compounds. It requires 100.0 mL
    15·1 answer
  • 7 on the pH scale represents what?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!