Answer:
2Ga2O3 = 4Ga + 3O2
Explanation:
You need to balance out the equation by making sure there are the same number of elements on each side.
Ga - 4 on each side
O - 6 on each side
Dry finish of powder coating avoid drips and runs
<u>Explanation: </u>
- The powder coating is a dry finish. It has a very thick finish which gives greater protection to the equipment.
- The powder coating is very durable.
- If we want perfect dry finishing then powder coating is the best option.
- This dry finish feature avoids drips and runs.
- Powder coating gives more safety than liquid paint.
- Liquid paint has acetone which causes respiratory problems.
- Powder coating is available in all colors and textures.
Answer:
- <em>1. The mass of an atom is concentrated at the nucleus.</em>
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- <em>3. Positive charge is condensed in one location within the atom.</em>
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- <em>4. The majority of the space inside the atom is empty space.</em>
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- <em>6. The atom contains a positively charged nucleus.</em>
Explanation:
When J.J Thmpson discovered the electron, he depicted the atom by the plum pudding model: a solid dough of homogeneously distributed positive charge (the pudding) containing negatively charged electrons (the plums).
Later, the scientist <em>Ernest Rutherford</em>, with its experiment of the gold foil experiment showed that the subatomic particles where not all concentrated in a solid part.
When a thin gold foil was bombarded with alpha particles (positively charged nuclei of helium atoms), most of the particles went through the gold sheet, with little deviation, but some particles bounded with a high deviation.
Such few high deviations were explained by the fact that there was a heavy region in the atom (the core or nucleus) with the positive charge that repelled the positively charged alpha particles.
Thus, <em>the mass of the atom was conentrated at the nucleus</em> (choice 1), where the positive charge is distributed in one location, which is the nucleus (not over the entire atom, just on the nucleus) discarding the choice number 2 (that a positive charge is spread equally over the atom) and proving choices 3 (<em>the positive charge is condensed in one location within the atom</em>) and 6 (<em>the atom contains a positively charged nucleus</em>).
Since most of the particles indeed went through the nucleus, this nucleus has to occupy little space, and most of the atom was empty space, proving choice 4 (<em>the majority of the space inside the atom is empty space</em>).
Because calcium<span> atoms have smaller radii </span>than potassium<span> atoms since </span>calcium<span> atoms have a greater nuclear charge. Each </span>calcium <span>atom will be closer to the delocalized electrons. Thus, the bonds in </span>calcium<span> will be </span>stronger than<span> that in </span><span>potassium.</span>