CHEMISTRY HIGH SCHOOL

What is the definition of anion

Answers

Answer 1
Answer:

Answer:

Negatively charged ion.

Explanation:

Example:

Oxygen is an element containing negatively charged ions. Its valence number is minus 2.

Hope this helps ;) ❤❤❤

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Humans are dependent on _______ for their food supply.a.waterb.biomassc.fossil fuelsd.timber

Answers

Answer: b. Biomass

Humans are dependent upon biomass for their food supply. Biomass is the organic matter that is produced by the living organisms during their life cycle. The biomass is transferred from one organism to other organism in a food chain when one organism is consumed by other organism in order to obtain food and energy. Human beings are hetrotrophic organisms, which means they are dependent upon plants and animals for their food and energy requirement. The food is a form of biomass, which is being transferred among the living beings in the food chain.

The answer is biomass

During the operation of a voltaic cell, the cell produces1) electrical energy spontaneously
2) chemical energy spontaneously
3) electrical energy nonspontaneously
4) chemical energy nonspontaneously

I need some help with this one ?

Answers

The answer is 1) electrical energy spontaneously

A voltaic cell is an electrochemical cell driven by a spontaneous chemical reaction and produces an electrical energy. The general form of reaction is
                     reagents → products + electrical energy.
This reaction is spontaneous.

However, the reverse reaction is nonspontaneous and it requires electrical energy.

Write the empirical formula for at least four ionic compounds that could be formed from the following ions:MnO4- , BrO3- , Fe2+ , Pb4+

Answers

HMnO₄ ; KMnO₄ ;  NaMnO₄; LiMnO₄
HBrO₃ ; KBrO₃ ; NaBrO₃ ; LiBrO₃
FeO ; FeCl₂ ; FeS ; FeSO₄
PbO₂ ; PbS₂ ; Pb(SO₄)₂ ; Pb(CO₃)₂

Final answer:

The empirical formulas for four ionic compounds given the ions MnO4-, BrO3-, Fe2+, and Pb4+ are Fe(MnO4)2 for Iron(II) permanganate, Pb(BrO3)4 for Lead(IV) bromate, Fe(BrO3)2 for Iron(II) bromate, and Pb(MnO4)4 for Lead(IV) permanganate.

Explanation:

The task is to write the empirical formula for ionic compounds that could be formed from specific ions. For the ions provided (MnO4−, BrO3−, Fe2+, Pb4+), we would pair each anion with a cation to neutralize the charge and create a stable ionic compound. Here are the empirical formulas for four possible ionic compounds:

  • Fe(MnO4)2: Iron(II) permanganate
  • Pb(BrO3)4: Lead(IV) bromate
  • Fe(BrO3)2: Iron(II) bromate
  • Pb(MnO4)4: Lead(IV) permanganate

Each formula is created by balancing the charges of the cations and anions to ensure that the overall charge of the compound is zero.

Why is the radius of a positive ion always less than the radius of its neutral atom? (A) the nucleus pulls the remaining electrons in closer.(B) The number of principal energy levels is always reduced. (C) The atomic orbitals contract all by themselves (D) Electron speeds are reduced

Answers

The radius of a positive ion always less than the radius of its neutral atom because  the nucleus pulls the remaining electrons in closer.

What is an atom ?

Each atom is made up of a nucleus and one or more electrons that are linked to it. One or more protons and a significant number of neutrons make up the nucleus.

Only the most prevalent kind of hydrogen is neutron-free. The smallest component of ordinary stuff that makes up a chemical element is an atom.

Quarks and electrons are the two categories of fundamental particles that make up an atom. An atom's nucleus is surrounded by an area of electrons. The electrical charge of every electron is negative one.

Protons and neutrons, which together make up an atom's nucleus, are made of quarks.

Thus, option A is correct.

To learn more about an atom, follow the link;

brainly.com/question/1566330

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Positive ions are positive because they have lost electrons.
(A)-This sounds accurate, but is actually not true. When an atom loses an electron and forms a positive ion, there will be less negative charge from the electrons to attract the positively charged nucleus. Losing electrons will actually decrease the attraction between the electrons and the nucleus.
(B)-This is true in some cases, but not all. If, for example, sodium were to lose an electron, it would drop down to having its largest orbital being in the second energy level, and would decrease in size. If magnesium were to lose an electron, it would still have one electron in the third energy level, so it wouldn't drop down an energy level.
(C) and (D)-Not sure where these answers even came from.

The actual reason behind the radius of a positive ion being smaller than the radius of its neutral atom is that the repulsive force between the electrons themselves is decreased, causing them to move closer together. 

Who developed a way of showing valence electrons?

Answers

American chemist Gilbert N. Lewis developeda way of showing valence electrons.
Gilbert N. Lewis was the scientist who developed a way of showing valence electrons.
:D

Which compound would most likely turn litmus paper to a red color?a. CH₃CH₂CH₂OH 
b. CH₃CH(Br)CH(Br)CH₃
c. CH₃CH₂CH(Br)CH₃
d. CH₃CH₂CH₂COOH 
e. CH₃CH₂CH₂CH₃

Answers

answer D, because it's acid
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