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:
Explanation:
Carbon Dioxide-CO2
To get molecules, we must convert grams to moles and moles to atoms using Avogadro's number.
Molar mass of CO2=
C:12.0g+O:16.0gx2=44.0g CO2
25.0g CO2 | 1 mol CO2 | 6.02x10 23 molecules CO2
= 3.42x10 23 molecules CO2
1 | 44.0g CO2 | 1 mol CO2
Now to get the number of oxygen atoms.
Since there are 3 atoms in CO2 and 2 of them are oxygen, we will divide by 3 (1.14x10 23) and multiply by 2 (2.28 x10 23)
So the number of oxygen atoms in 25.0 grams of CO2 is 2.28x10 23 or 228 000 000 000 000 000 000 000
Answer:
The formula for a Potassium ion is K+
If the electrolyte contains chemical species that will be reduced at the cathode or oxidized at the anode (or both), that means chemical change. The electrolyte can form one or more compounds or ionic species that weren't there before.
<span> A given species could form at one </span>electrode<span> but diffuse back over to the other electrode where it promptly breaks back up into its reactants. </span>
<span>If the electrolyte does not participate in any reaction(s), it will just act as a conductor of electricity. The same goes for the electrodes. Some materials will react but will not produce anything obvious (gases, precipitates, or color changes). Others will not react at all under the specific combinations of voltage and current. </span>
