QUICK QUESTION: On the Bohr model, how come potassium has 19 electrons in its valence shell if potassium has a K+? Isn’t it suppose to have 18 electrons? I thought that if an ion has a positive charge, the atom has lost electrons. Pls help me I WILL GIVE BRAINLIEST TO THE BEST ANSWER

Answers

Answer 1

Answer:

Answer: K only has 1 valence electron. It will leave with only a little effort, leaving behind a positively charged K^+1 atom.

Explanation: A neutral potassium atom has 19 total electrons. But only 1 of them is in potassium's valence shell. Valence shell means the outermost s and p orbitals. Potasium's electron configuration is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1. The 4s orbital is the only orbital in the 4th energy level. So it has a valency of 1. This means this electron will be the most likely to leave, since it is the lone electron in the oyutermost energy level (4). When that electron leaves, the charge on the atom go up by 1. The atom now has a full valence shell of 3s^2 3p^6, the same as argon, Ar.

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Look at the equation below.O2 + CS2 → CO2 + SO2Which of the following shows the equation balanced?A. 3 O2 + CS2 → CO2 + 2 SO2B. 3 O2 + CS2 → 2 CO2 + SO2C. O2 + CS2 → CO2 + SO2D. 4 O2 + 4 CS2 → 4 CO2 + 4 SO2
Mixtures can be separated by physical changes. Please select the best answer from the choices provided T F
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Which of these equations is balanced? A. H2O+Co ---> H2Co3 B. 2NaCl +H2SO4 ----> Na2SO4 + 2HCl C. 2CaO+ H2O ----> Ca(OH)2 D. Mn +Fe ----> MnS + Fe

Answers

Answer is: B. 2NaCl +H2SO4 ----> Na2SO4 + 2HCl.

According to principle of mass conservation, number of atoms must be equal on both side of balanced chemical reaction.

There are two sodium atoms, two chlorine atoms, two hydrogen atoms, one sulfur atom and four oxygen atoms on both side of balanced chemical reaction.

A) This reaction is not balanced, because number of oxygen atoms are not the same.

C) This reaction is not balanced, because number of oxygen and calcium atoms are not the same.

D) This reaction is not balanced, because number of sulfur atoms are not the same.

The equatin that is balanced is 2NaCl + H2SO4 → Na2SO4 + 2HCl. The answer is letter B. The reactant has two Na, 2 Cl, 2 H, 1 S and 4 O. These number of atoms is also the same for the product side.

How can compact fluorescent bulbs help the environment? (2 points) They will create new industry.
The will use less energy overall.
They will further science and technological development.
They will provide society with a product that is in short supply.

Answers

Answer : fluorescent bulbs help the environment as they use less energy overall

Explanation :

Fluorescent bulbs are energy efficient. They consume less electricity as compared to conventional bulbs. They also generate less heat.

In modern world, we are facing energy crisis. The non renewable energy sources are getting depleted. It is highly necessary that we should start using alternative energy sources such as non renewable energy sources more often.

Another way to reduce our energy consumption is to use gadgets which use electricity more efficiently. One example is fluorescent bulb over traditional incandescent bulbs.

Therefore we can say that fluorescent bulbs help environment by using less energy and by producing less heat.

The answer to this question is " They will use less energy overall."

Joseph, a supervisor at H2O Chemicals Inc., needs to assess the behavior of 25 people, who constitute a large group of his subordinates. Which of the following methods combines ease of use with objectivity and a basis for providing feedback?

Answers

Answer:

behavioral observation scale

Explanation:

According to my research on different methods for providing feedback, I can say that based on the information provided within the question Joseph should use a behavioral observation scale. This feedback method measures the level of performance and frequency of certain behaviors. In this situation this feedback method would be the easiest and most accurate method of providing feedback.

**Even though no answer choices were provided this method is the most used in these types of situations.**

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

The empirical formula for a compound is CH2. If n is a whole number, which shows a correct relationship between the molecular formula and the empirical formula? a) empirical formula mass / molecular mass = n B) molecular mass = element mass / empirical formula mass ´ 100 c) subscript of H in empirical formula = 2 subscript of H in molecular formula D) subscript of C in molecular formula = n subscript of C in empirical formula

Answers

An empirical formula is the "reduced" version of a molecular formula. For example, CH3 is the empirical formula for C2H6, C3H9, C4H12, and so forth. The difference in subscripts between an empirical formula and molecular formula is given by the constant n. If n is a whole number, this means the numerator is the molecular formula. So the answer is D. subscript of C in molecular formula = n subscript of C in empirical formula. This can be rewritten as:

n = subscript of C in molecular formula/subscript of C in empirical formula

Answer:

Explanation:

Draw and name all the isomers of the alkene C4H8

Answers

....H....H....H....H
....|.....|…..|…..|
H-C==C----C----C-H
.....….....…..|.....|
.................H.....H
butan-1-ene/butene/but-1-ene

....H....H....H....H
....|.....|…..|…..|
H-C----C==C----C-H
....|….....…........|
....H..................H
butan-2-ene/but-2-ene
These are the structural isomers of butene.The geometric isomers include trans-but-2-ene and cis-but-2-ene.
HOPE THIS HELPS *WINK*

Which element is likely to be the most brittle

Answers

Answer : Selenium

Explanation :

The complete question is attached in the attachment.

Out of the given options, Selenium is the one which is most brittle element.

As selenium is a metalloid or a crystalline non metal which is lustrous and is ductile in nature and is highly brittle in nature.

Selenium is the most brittle out of all the other elements

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Mrs. Rushing has 3 chemistry classes with 24 students in each. An experiment calls for each student to use 4 test tubes. How many test tubes are needed in all for her classes?A.) 32 test tubesB.) 96 test tubesC.) 288 test tubesD.) 384 test tubes

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