CHEMISTRY HIGH SCHOOL

Which activity is the best demonstration of J. J. Thomson’s use of creativity in his work?

Answers

Answer 1
Answer:

The plum pudding model of the atom by the scientist Sir Joseph John Thompson or J.J. Thompson. It was theorized after the discovery that electrons are present in the atom. In this model, the atom is composed mainly of electrons. It was describe as plum pudding because the electrons are dispersed within the atom. John Dalton discovered the atom. Ernest Rutherford discovered the half – life of an atom and Neils Bohr explain the quantum mechanics. So the answer is J.J. Thompson.
Answer 2
Answer:

interpreting the results of his experiments

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Petroleum and coal can be mined from the continental shelf. t/f

Answers

True

Petroleum and coal can be mined from the continental shelf. Hot magma from inside the Earth seeps out from the crevices in the mid-ocean ridge. There is speculation regarding whether this is a cost-effective technique. Fossil fuels and mineral deposits can be located all throughout the continental shelf and also in some of the deepest depths of the ocean.

Answer:The given statement is true.

Explanation:

Continental Shelf: A portion of continent submerged under the relative shallow ocean water.Most of the gradually slopes down in to the water.

The relatively flat surface and shallow water makes it fitr place to harvest sea food, non renewable energy resources like : coal, petroleum .

a hydrogen atom has one proton, two neutrons, and no electrons. Is this atom an ion? Explain your answer.

Answers

An atom is a neutral species. Hence, it must have same number of electrons and protons. On other hand, ions have charge. Hence, number of protons and electrons are not same.

In present case, hydrogen has one proton, two neutrons, and no electrons. This signifies that overall charge of species is +1. Hence,  it is an ion. 
yes this is an ion because an ion is defined as an element that has gained or lost electrons. There should be 1 electron is Hydrogen but since there aren't any that means that it is an ion which is commonly written as H^+.

A cluster of billions of atoms that all have magnetic fields lined up in the same way is known as aa. magnetic field line.
b. magnetic pole.
c. magnetic domain.
d. permanent magnet.
The region around a magnet where the magnetic force is exerted is known as its
a. magnetic pole.
b. lodestone.
c. magnetic field.
d. magnetic domain.

Answers

A cluster of billions of atoms that all have magnetic fields lined up in the same way is known as a

The answer is letter C. Magnetic domain.


The region around a magnet where the magnetic force is exerted is known as its
The answer is letter C. Magnetic field.

Answer:

i think its b tell me if im wrong if i am sorry

Explanation:

A 1.0 m h2s solution has a ph = 3.75 at equilibrium. what is the value of ka?

Answers

 When H2S dissociates in water, it forms 2H+ and S2-. This means the expression of Ka [H+]^2[S2-] / [H2S]. H+ concentration can be derived from the pH thru 10^-pH. This is  equal to 1.7783 x10^-4 M. Ka now becomes [1.7783 x10^-4 M]^2*[1.7783 x10^-4 M/2]/ [1.0-1.7783 x10^-4 M] equal to 2.8122 x10^-12.  

Answer:

3.16 × 10−8

Explanation:

The pH of a solution can be calculated using which formula?

Answers

Answer:The pH is the negative log of H+

Explanation:a p e x

There are quite a few relationships between [H+] and [OH−] ions. And because there is a large range of number between 10 to 10-15 M, the pH is used. pH = -log[H+] and pOH = -log[OH−]. In aqueous solutions, [H+ ][OH- ] = 10-14. From here we can derive the values of each concentration.

 

 -log[H+ ] + -log[OH- ] = -log[10-14]

pH + pOH = 14

So pH = 14 – pOH and pOH = 14 – pH 

What is mean by scientific approach in chemistry
brief it

Answers

Answer:

scientific approach

Explanation:

Method of investigation in which a problems is First identified and observations, experiment are done
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