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
aleksley [76]
3 years ago
7

Why does a new period start on the periodic table, instead of the row continuing? A. A new period starts when a new energy shell

starts. B. A new period starts when a new neutron cycle starts. C. None of these D. It is based on how many protons it has.
Chemistry
1 answer:
Allushta [10]3 years ago
8 0

Answer:

B

Explanation:

All the elements in a period have valence electrons in the same shell. The number of valence electrons increases from left to right in the period. When the shell is full, a new row is started and the process repeats.

You might be interested in
Which statement correctly compares an atom of an alkali metal with an atom of the alkaline earth metal next to it on the periodi
wolverine [178]
The atom of alkaline earth metal has one more proton and one more electron than the alkali metal that is next to it to the left on the periodic table. Then the atomic number of the alkali metal is one unit less than the atomic number of the alkaline earth metal next to it.
4 0
2 years ago
Consider each possible structure of carbon dioxide, c o 2. Determine whether the structure is correct and justify your decision.
Mrrafil [7]

This structure is correct due to the total number of bonds and electrons

We employ the octet rule, which states that all atoms in a compound are expected to follow, to check the accuracy of any chemical structure. The octet rule is precisely satisfied for each atom in the depicted structure of carbon IV oxide. The valence shell of each atom in the molecule is surrounded by eight electrons. We may thus infer that this structure is accurate given the total number of bonds and electrons since CO2 has sixteen valence electrons.

It possesses a negative charge of 1.602176634 coulombs, the basic unit of electric charge, which is comparable to its negative charge. The rest mass of an electron is 9.1093837015 10^-31 kg, or just 1/1,836 the mass of a proton. An electron is therefore considered to have practically negligible mass in comparison to a proton or neutron, and its matter is not taken into consideration when calculating an atom's mass number.

The question is incomplete, the complete question is found in the image attached to this answer

To know more about   bonds visit : brainly.com/question/13190131

#SPJ4

6 0
1 year ago
This reaction forms triphenylmethanol from benzophenone. How could you use infrared spectroscopy to show that the benzophenone h
nasty-shy [4]

Complete Question

The complete question is shown on the first uploaded image  

Answer:

The consumption of the reactant benzophenone and the production of  triphenylmethanol can be detected using their IR absorption spectrum

    This reaction is shown on the second uploaded image  

The reactant  benzophenone is a compound which contains a carbonyl functional group, and the stretching frequency of C=O bond has a high absorption at around 1680 \ cm^{-1} and frequency band of this wavelength is absent in triphenylmethanol.

in the same vain the product   triphenylmethanol is a compound which contains a hydroxyl (OH) functional group, and the stretching frequency of O-H bond has a high absorption at around 3474 \ cm^{-1} and frequency band of this wavelength is absent in benzophenone.

    To use infrared spectroscopy to show that the reaction is occurring is to show the disappearance of the 1680 \ cm^{-1}  frequency band which indictes the consumption of benzophenone and the appearance  3474 \ cm^{-1}  frequency band  which indictes the formation  of triphenylmethanol

Explanation:

3 0
3 years ago
In Experiment 9, a 1.05 g sample of a mixture of NaCl (MW 58.45) and NaNO2 (MW 69.01) is reacted with excess sulfamic acid. The
Kaylis [27]

Answer:

There is 76.6 mL of nitrogen collected

Explanation:

<u>Step 1: </u>Data given

Mass of the sample = 1. 05 grams

The sample is 40.00% by mass NaNO2

MW of NaCl = 58.45 g/mol

MW of NaNO2 = 69.01 g/mol

Temperature = 22.0 °C

Pressure = 750.0 mmHg = (750/760) atm

The vapor pressure of water at 22.0°C is 19.8 mm Hg = 0.02605 atm

<u>Step 2:</u> Calculate mass of NaNO2

(40/100)*1.05  = 0.42 grams

<u>Step 3:</u> Calculate moles of NaNO2

Moles NaNO2 = 0.42 grams / 69.01 g/mol

Moles NaNO2 = 0.00608 moles

<u>Step 4:</u> Calculate moles of N2

For 2 moles of NaNO2 we'll get 1 mol of N2

For 0.00608 moles of NaNO2 we'll get 0.00608/2 = 0.00304 moles

<u>Step 5:</u> Calculate pressure of N2

P = 750.0 - 19.8 = 730.2 mmHg = (730.2/760)atm = 0.96079 atm = 97352 Pa

<u>Step 6:</u> Calculate volume of N2

PV = nRT

⇒ P = the pressure of N2 =  0.96079

⇒ V = the volume of N2 = TO BE DETERMINED

⇒ n = moles of N2 = 0.00304 moles

⇒ R = the gas constant = 0.08206 L*atm/K*mol

⇒ T = the temperature = 22°C = 295 Kelvin

V = (0.00304*0.08206*295)/0.96079

V = 0.0766 L = 76.6 mL

There is 76.6 mL of nitrogen collected

4 0
3 years ago
During a solar flare, it is most likely that
ludmilkaskok [199]

Answer:

During a solar flare, the built up magnetic energy n the solar atmosphere is released at once. If a strong solar flare hits the earth, it is most possible that it will destroy the electronics. It is not expected to effect any human beings unless they are travelling towards the outer space are living at higher altitudes.

It can lead to skin can in case of extreme exposures.

I hope the answer is helpful.

Thanks for answering.

6 0
2 years ago
Read 2 more answers
Other questions:
  • A sample of water with a mass of 622.7g undergoes a temperature change from 90.98°C
    15·1 answer
  • If you need to make 240 g lioh, how many grams of li3n must you react with excess water?
    7·2 answers
  • Which of the following equations is balanced?
    11·1 answer
  • Reactions that affect the nucleus of an atom are called
    14·1 answer
  • How many electrons does a single hydrogen gain or lose in the following reaction?<br> H2 + O2 - H20
    9·1 answer
  • How to make 0.01 Molar solution in 30 ml of water
    11·1 answer
  • Pls help me guys please please​ only 1 question choose
    7·1 answer
  • The basic principles of atomic theory were first conceived by:
    8·1 answer
  • Identify each definition that applies to the compound in red. Check all that apply. HCI NaOH → H2O NaCl Arrhenius acid Bronsted-
    7·1 answer
  • The water-gas shift reaction plays a central role in the chemical methods for obtaining cleaner fuels from coal:CO(g) + H₂O(g) ⇄
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!