CHEMISTRY HIGH SCHOOL

Which group of atomic models is listed in historical order from the earliest to the most recent?(1) hard-sphere model, wave-mechanical model, electron-shell model
(2) hard-sphere model, electron-shell model, wave-mechanical model
(3) electron-shell model, wave-mechanical model, hard-sphere model
(4) electron-shell model, hard-sphere model, wave-mechanical model

Answers

Answer 1
Answer: The group of atomic models that is listed in historical order from the earliest to the most recent hard-sphere model, electron-shell model, wave-mechanical model. The answer is number 2. The rest of the choices do not answer the question above.
Answer 2
Answer:

Answer:2

Explanation:

HARD SPHERE MODEL

According to Dalton he viewed atoms as tiny, solid balls. His atomic theory had four statements which are:

1. Atoms are tiny, invisible particles.

2.Atoms of one element are all the same.

3.Atoms of different elements are different. 4.Compounds form by combining atoms.

ELECTRON SHELL MODEL

Bohr modified Rutherfords model of the atom by stating that electrons moves around the nucleus in orbit fixed sizes and energies.

WAVE MECHANICAL MODEL

Erwin states that electrons do not move in set path around the nucleus but in waves. He said it is impossible to know the exact point of an electron instead we have clouds of probability called the clouds.

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Which term describes a substance that increases the concentration of hydroxide ions in solution?Lewis definition of an acid
Arrhenius definition of a base
Bronsted-Lowry definition of a base
Bronsted-Lowry definition of an acid

Answers

Since the question pertains to hydroxide ions, or OH-, then we can be sure that the answer is a base. All we have to do is differentiate which of the definition is more appropriate. A Bronsted-Lowry base is defined as the substance that accepts a proton. An Arrhenius base is the substance that produces OH- during the acid-base reaction. Hence, the answer is Arrhenius definition base.

Answer

its B

Explanation:

Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. a bottle contains 425 ml of insulin at a concentration of 20.0 mg/ml . what is the total mass of insulin in the bottle?

Answers

Answer is: mass of insulin in the bottle is 8500 milligrams or 8.5 grams.

V(insulin) = 425 ml; volume of solution.
d(insulin) = 20.0 mg/ml; density of solution.
m(insulin) = V(insulin) · d(insulin).
m(insulin) = 425 ml · 20 mg/ml.
m(insulin) = 8500 mg.
m(insulin) = 8500 mg ÷ 1000 ml/l.
m(insulin) = 8.5 g.

Given a formula of a functional group: An organic compound that has this functional group is classified as

Answers

An organic compound that has this functional group is classified as Unsaturated hydrocarbons, Halides, Acids and bases, Aldehydes and Ketones. 

PLEASE HELP ME!!! AAHH IM TRAPPED

Answers

what exactly do you need help with?Your question is quite open ended.

Answer:

you got out?

Explanation:

The first particles to evaporate from a liquid are those

Answers

the partials that evaporate from liquid is gas

The first particles to evaporate from a liquid are those at the surface with the highest kinetic energy. These particles have sufficient energy to overcome the intermolecular forces of the liquid and become a gas.

The first particles to evaporate from a liquid are those at the surface of the liquid that have the highest kinetic energy. Evaporation is a process that occurs when particles at a liquid's surface have sufficient energy to break free of the liquid's intermolecular forces and become a gas, such as when water boils to steam. This is why sometimes we see a liquid seeming to 'disappear' over time, like a puddle drying up in the sun - it's the liquid evaporating.

Particles must have enough energy for the liquid to overcome the forces that are keeping them in the liquid. This energy is more likely to be found in particles at the surface, as they are not surrounded by other particles on all sides and therefore experience less resistance to their motion.

Learn more about Evaporation here:

brainly.com/question/34545146

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What hypothesis did Miller-Urey test in their experiment?A. Organic molecules can form in a reducing atmosphere.
B. Earth is a primordial soup.
C. Organic molecules cannot survive in a reducing atmosphere.

PLEASE HELP AS SOON AS POSSIBLE!

Answers

A. Organic molecules can form in a reducing atmosphere

Hope this helps!
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