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
balandron [24]
3 years ago
15

State and explain modern periodic table. ⊕⊕

Chemistry
2 answers:
Svetradugi [14.3K]3 years ago
7 0

Explanation:

the physical and chemical properties of an element are periodic functions of their atomic number.

poizon [28]3 years ago
6 0

Answer:modern periodic table is published by Henry Moseley and he believes that ' properties of an elements are periodic function of the atomic number' and he classify the periodic table by groups and perieods so in the modern periodic table there are seven periods and eighteen groups.

You might be interested in
Calculate the change in pH when 71.0 mL of a 0.760 M solution of NaOH is added to 1.00 L of a solution that is 1.0O M in sodium
Eddi Din [679]

Explanation:

It is known that pK_{a} value of acetic acid is 4.74. And, relation between pH and pK_{a} is as follows.

                    pH = pK_{a} + log \frac{[CH_{3}COOH]}{[CH_{3}COONa]}

                          = 4.74 + log \frac{1.00}{1.00}

So, number of moles of NaOH = Volume × Molarity

                                                   = 71.0 ml × 0.760 M

                                                    = 0.05396 mol

Also, moles of  CH_{3}COOH = moles of CH_{3}COONa

                                          = Molarity × Volume

                                          = 1.00 M × 1.00 L

                                          = 1.00 mol

Hence, addition of sodium acetate in NaOH will lead to the formation of acetic acid as follows.

            CH_{3}COONa + NaOH \rightarrow CH_{3}COOH

Initial :    1.00 mol                                  1.00 mol

NaoH addition:               0.05396 mol

Equilibrium : (1 - 0.05396 mol)    0           (1.00 + 0.05396 mol)

                    = 0.94604 mol                       = 1.05396 mol

As, pH = pK_{a} + log \frac{[CH_{3}COONa]}{[CH_{3}COOH]}

               = 4.74 +  log \frac{0.94604}{1.05396}

               = 4.69

Therefore, change in pH will be calculated as follows.

                         pH = 4.74 - 4.69

                               = 0.05

Thus, we can conclude that change in pH of the given solution is 0.05.

8 0
3 years ago
Why is the endocrine system important?
Zepler [3.9K]
The endocrine system is important to the function of the human body because, endocrine glands release hormones into the bloodstream. Which lets the hormones travel to the cells in other parts of the body. This also helps control mood, growth and development, the way our organs work, metabolism and reproduction.
8 0
3 years ago
The diagram shows three isotopes. What element is represented?
lisov135 [29]

Answer:

Where is the diagram?please put the pictu

3 0
3 years ago
Read 2 more answers
Balance the following reaction: NaOH + HCl → NaCl + H2O Enter your answer in
Korvikt [17]
<span>NaOH + HCl = NaCl + H2O</span>
8 0
3 years ago
Household items that are substances
Yuri [45]

Answer:

water,salt are the house hold items

4 0
3 years ago
Other questions:
  • If 40.0 g of HCl react with an excess of magnesium metal, what is the theoretical yield of hydrogen?
    10·2 answers
  • What is the momentum of a 0.01 kg toy car moving at 5.0 m/s?
    14·1 answer
  • Calculate the mass of each element in the compound by multiplying its molar mass
    6·1 answer
  • Explain what a covalent bond is, what types of elements form covalent bonds and give an example of 2 elements that could bond co
    14·1 answer
  • Question 5 Tungsten is a solid phase of tungsten still unknown to science. The only difference between it and ordinary tungsten
    14·1 answer
  • HELPP ME !!!! DUE NOW!!!!!!
    7·2 answers
  • 65 g of NaOH is dissolved to make 500 mL of solution. Find moles of NaPH and Molarity of solution.
    10·1 answer
  • If 5.00 g of O2 gas has a volume of 7.20 L at a certain temperature and pressure, what volume does 15.0 g of O2 have under the s
    11·1 answer
  • Describe the major advantages and disadvantages of asexual and sexual reproduction.
    15·1 answer
  • 3c reaction time =138.5 sec reation rate=
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!