An atom is the smallest particle of an element that can take part in a chemical reaction.
An atom is made up of energy levels that contain electrons which are negatively charged and the nucleus which contains neutrons and protons that are negatively charge .
Due the positive charge of the nucleus of an atom, an atom always want to attract its electrons and keep them near it however it weakly attracts the other electrons of a nearby atom.
These readings suggest the balance is: precise accurate neither accurate nor precise accurate and precise
<span>we know that each
element has an unique spectra and it can be used to identify the
element. it shows that the energy levels of the electrons and different colors are the result of different wavelengths.
hope it helps
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Answer:
Answer is option D.
The terms vitrification, oxidation, water smoking, and flashing are all associated with firing bricks in a kiln.
Explanation:
Brick is one of the building materials made from the clay. The manufacturing process of brick include;
1) Winning - It is the process of mining of clay and its transportation to the manufacturing site.
2) Preparation - It includes the crushing and grinding of clay and later mixing them into a uniform raw material.
3) Forming/Molding - It is the process of mixing water with the clay mix and mold it into the desired shape. The plasticity of the clay depends on the amount of water used.
4) Drying - The process of removing the moisture from wet clay by drying it through evaporation.
5) Firing and Cooling - Firing is the process of burning the clay in a kiln and it usually requires 40 - 150 hours. The different stages in firing are;
- Water smoking or dehydration stage - It is a process in which free water retained in the pores of the clay after drying gets evaporated under a high temperature of 400-650°C and the clay loses its plasticity. Some of the carbonate minerals are eliminated.
- Oxidation - This process occurs at a very high temperature of 650-900°C in which the ferrous iron is oxidized to the ferric form and the remaining carbon is eliminated.
- Vitrification- This process occurs at a very high temperature of 900- 1100°C for low melting clay and 1000-1250°C for high melting clay, where the clay is transformed into a soft molten mass as a result of an increase in temperature. It gradually loses the shape and transforms into a glassy structure after cooling.
- Flashing - In this process, the fire in the kiln is regulated in such a way that it causes a reduction in the kiln temperature and the cooling process begins which produces color variations in bricks.
6) Drawing - It is the process involving the unloading of the kiln after cooling and packing of the bricks for further shipment.
Answer:
8.3ml
Explanation:
to get volume u have to divide 25g over the density, i rounded to the nearest tenth, if you don't want to then write out the full number with all the decimals