CHEMISTRY HIGH SCHOOL

The modern atomic model is also sometimes called the __________ model.a. solar system
b. Bohr
c. plum pudding
d. quantum mechanics

Answers

Answer 1
Answer: The correct answer is B. The modern atomic model is also sometimes called the Bohr model. This model was introduced by Niels Bohr in 1913. According to this model, an atom is a small, positively charged nucleus which is surrounded by negatively charged particles called electrons.
Answer 2
Answer:

The answer is B. Bohr

Related Questions

What does the molecular formula of a compound describe?
Which Pair Of Compounds Are Isomers?1) CH3CH2CH3 and CH2CHCH3 2) CH2CH2 and CH3COCH3 3) Ch3OCH3 and CH3COCH3 4) CH3COCH3 and CH3CH2CHO I'd like to know the steps to answering this question. Thanks!
Calculate the pH of the aqueous solution of 0.0243 M HNO3(aq).
Calorimetric studies show that the reaction is exothermic. 2NO2(g) N2O4(g) + 14.1 kcal. Based on this information, which one--if any--of the following additional changes would increase the molar concentration at equilibrium of N2O4(g)?
The reaction of a Lewis acid with a Lewis base would most likely be accompanied by an increase in which item?covalent bonds hydronium ions electron pairs hydroxide ions

A piece of wood and a piece of steel are at the same temperature; however, the steel feels hotter. This is because the steel has _____. A- more entropy
B- greater thermal conductivity
C- greater thermal insulation
D- a higher R-value

Answers

Answer: The correct answer is "greater thermal conductivity".

Explanation:

Thermal conductivity: It is a ability to conduct heat. Heat transfers occur at a lower rate to material at higher thermal conductivity.

It is defined as the rate at which the heat is transferred through a unit thickness of the substance per area per change in the temperature.

In the given problem, A piece of wood and a piece of steel are at the same temperature. However, the steel feels hotter. The thermal conductivity of the steel is more than the thermal conductivity of the wood.

Therefore,  the correct option is "greater thermal conductivity".

B- Greater thermal conductivity

How many valence electrons does a neutral atom of aluminum have?

Answers

The number of valence electrons that a neutral atom of aluminum has is 3 valence electrons.

What are valence electrons?

Valence electrons are those electrons in the outermost parts of elements that can be combined or loned to other elements during chemical reactions. Aluminum has three electrons in the valence shell.

The total number of electrons that aluminum has is 13 and the 3P1 shell has three electrons. So, this is the number of valence electrons.

Learn more about valence electrons here:

brainly.com/question/371590

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Answer:

Aluminum has 13 electrons in a neutral atom. The 1S2, 2S2 and 2P6 shells are full, and so is the 3S2. The 3P1 shell has one electron in it (in Al's neutral atom) and that gives aluminum one lone valence electron and two "semi-valence" electrons which can be loaned out.

Explanation:

For any point on earths surface its height above sea level is called its

Answers

Answer:

The correct answer is elevation.

Explanation:

In a geographical place, the elevation refers to the height below or above a precise reference point generally above the sea level. The term elevation is primarily applied when considering towards the points on the surface of the Earth, while geopotential height or altitude terms are used for considering the points above the surface like a spacecraft in orbit or an aircraft in flight, and depths are applied for the points underneath the surface.
Altitude, If this helped please 5 star me 

To prevent accidental poisoning, you should NOT __________.a. mix chemicals in well ventilated areas
b. follow the instructions on the label
c. keep materials in unlabeled containers
d. use chemicals in well ventilated areas

Answers

Answer: option C. keep materials in unlabeled containers.


Justification:


Indeed, keeping materials in unlabeled containers is a risky, dangerous, bad practice.


Labels should be according to international standards. That is, further to the name of the product, labels must signal the danger associated with the product: whether it is poison, toxic, flammable, acid, caustic, explosive, or harmful to the body or the enviroment.


On the other hand, the other options, a. mix chemicals in well ventilated areas, b. follow the instructions on the label, and d. use chemicals in well ventilated areas, are good safety practices, among many others.

Answer: C

Explanation:

Keep materials in unlabeled containers

Which of the following is a synthesis reaction?C2H4 + 3O2 yields 2CO2 + 2 H2O

2HCl yields H2 + Cl2

2K + 2HCl yields 2KCl + H2

SO3 + H2O yields H2SO4

Answers

SO3+H2O yields H2SO4 is the correct answer for your question, WELCOME:)
the last one is the answer to your question. D is the answer

True or False: Changes in states of matter indicate a chemical change.

Answers

False, changes in matter indicate a physical change.

Answer:

False

Explanation:

Changes in state of matter indicates a physical change. Always remember these learning tools:

For Physical Changes:  

S - Size, Shape, State

For Chemical Changes:

Odor  Color  Bubbles/Gas  Light  Temperature  Precipitate

Ol'    Country  Boys/Girls     Like         Their           Pickups

Hope this helps!!!❤️
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Which element has both metallic and nonmetallic properties?(1) Rb (3) Si(2) Rn (4) Sr
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How doesthe pressure inside a rigid container change if theabsolute temperature of the gas inside is quadrupled?