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Elis [28]
3 years ago
15

His model of the hydrogen atom led to an accurate calculation of the wavelengths of light emitted by an excited hydrogen atom.

Chemistry
2 answers:
a_sh-v [17]3 years ago
8 0
I think it is Bohr's model of the hydrogen atom led to an accurate calculation of the wavelengths of light emitted by an excited hydrogen atom. <span>Niels </span>Bohr<span> introduced the atomic </span>Hydrogen model<span> in 1913. He described it as a positively charged nucleus, comprised of protons and neutrons, surrounded by a negatively charged electron cloud.</span>
Umnica [9.8K]3 years ago
5 0

Answer:

The statement is referring to

<h2>Niels Bohr.</h2>

Explanation:

Niels Bohr was a physicist who contributed to the understanding of atoms, through is model that he idealised using Hydrogen as an example, because it's the simplest element existing.

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Match the words to the definitions below.
puteri [66]

Answer:

Explanation:

1. Turns litmus paper blue, taste bitter, donate OH- ions, feel slippery, 8-14 on pH scale.

BASE

BASE: A base is a substance that reacts with water to yield excess hydroxide ions.

Some of its characteristics are:

>It has a bitter taste

>Their aqeuos solutions have a soapy feel

>They have a PH greater than 7

>They turn red litmus paper blue

>They are electrolytes

2. The amount of ions per an amount of solvent. Ex: 10g salt/100g water

CONCENTRATION

Concentration is the amount of solute that can be found in a solution.

3. A lab procedure to deliver a measured volume of solution, generally measured in ml.

TITRATION

Titration is a laboratory procedure that is used to determine the amount of solution that is needed to drive a reaction to completion. It involves adding a solution to a known volume of another solution.

4. A substance or solution that resists changes in pH by stabilizing hydrogen ion concentration.

BUFFER

A buffer is solution that is made up of weak acids and their salts or weak bases and their salts. Such solutions are able to resist changes in PH

5. Turns litmus paper red, taste sour, donate H+, corrode metals, 0-6 on pH scale.

ACID

An acid is a proton donor, hydrogen ions.

Characteristics:

>Acids turns blue litmus paper red, they have sour taste and easily corrodes metals.

>They have a PH value between 0-6 on the scale.

>They are generally electrolytes

6. Logarithmic scale to indicate the amount of hydrogen ions in solution.

PH SCALE

A PH scale is a logarithmic scale that runs from 1-14 and is used to indicate the amount of hydrogen ions in a solution.

7. A chemical (dye created from lichens) that changes color in response to changes in pH.

LITMUS PAPER

Litmus paper is made of dyes created from lichen and it changes its color as PH changes. Acids turns blue litmus paper red while bases changes the color of litmus to blue from red. Litmus test is a popular test for solutions.

8. Acids and bases are added proportionally and result in a chemical reaction that causes the pH of a solution to reach pH 7.

NEUTRALIZATION

Neutralization is the reaction of acids and bases to produce salts and water. The endpoint of neutralization reaction signifies the point at which equal number of bases neutralizes an acid. The PH is 7 at this point.

5 0
4 years ago
What type of temperature changes produce large crystals
vladimir1956 [14]
Warm temperatures will make crystals form quicker and larger
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3 years ago
At one point in your life, you might have played on a swing. Have you ever wondered why, after the first swing, it will slow dow
cestrela7 [59]

Answer:

at the top of the swing

at the top of the swing

at the bottom of the swing

at the bottom of the swing

Explanation:

7 0
3 years ago
How could you separate a mixture of sulfur, gold and ethanol? <br>​
stira [4]

Answer: Dissolve it  

Explanation:

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What types of damage can wind cause?
Levart [38]

Answer:

Wind between 39-46 mph can cause branches and limbs to break, make it hard for cars to stay on the road wind between 47-54 can cause lighting difficulties, wind between the 60-78 can cause trees to uproot and damage.

Explanation:

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