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Why is an atom electrically neutral?

Changing the electrons not only changes the neutrality of the atom, but it can also change the physical and and chemical properties of the atom. Adding an electron to a chlorine atom changes its reactiveness dramatically. Regular, neutral chlorine atoms will automatically combine to make chlorine gas, which is highly toxic. By adding an electron to the gas, it becomes so unresponsive it can safely be moved and handled as needed. The same changes can be made by removing electrons from other types of atoms also.

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What is an experiment that uses the scientific method?

The topic of this experiment is, does the amount of sunlight a tomato plant receives affect the size of the tomatoes it produces, according to Science Made Simple. To run this experiment, get two tomato plants. Place one where it will receive little to no sunlight and place the other in a location that receives plenty of sun.The first step in the scientific method is the hypothesis. Hypothesize about whether or not sun has a role to play in the size of tomatoes. A hypothesis can be something simple like, "The more sun a tomato plant receives, the larger the tomatoes will be."The next step is p..

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Which blood type is the universal acceptor?

Blood type is categorized based on which antigens are on the red blood cells. There are four antigens, or antigen groups: A, B, AB and O. Each of these can further be divided into positive and negative. For example, a person can have either A- blood or A+ blood. If the cells have a specific type of antigen on top of the main four, called an Rh factor, it is positive. If it is missing, the blood is negative.

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Does mass affect terminal velocity?

Terminal velocity is also influenced by frontal area, or the area closest to the ground. A smaller frontal area is less affected by drag forces and wind resistance, so it reaches terminal velocity more quickly. Given two objects of the same size and shape but with different mass, the heavier one has a higher terminal velocity because Earth's gravity attracts it more strongly.

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What is electromotive force?

Electromotive force can come from magnetic induction or it can be generated chemically by batteries. When a magnetic field interacts with an electrically-conductive material, the field's repulsion causes the electrons in the conductor to move away, thus producing electrical current. The electrons then gather at one end of the conductor, creating an area of higher electrical potential, while the opposite end is positively charged. Attaching two wires and a component load to this new power source creates a basic circuit.\nBatteries make use of oxidation reactions to strip electrons away fro..

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What is the chemical formula for potassium iodide?

Potassium iodide is a weak reducing agent. It turns yellow when exposed to air due to oxidation. It is obtained industrially from the reaction of iodine with potassium hydroxide. Potassium iodide has a wide range of uses. It is used industrially to obtain silver iodide, as a fluorescence quenching agent and as a component in dye sensitized solar cells. It is used as a source of iodine in nutrition. It also has several medicinal uses, including as a remedy for radiation poisoning and hyperthyroidism.

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How much water and NaOH is needed to make a pH of 11.0?

The pOH of a solution at room temperature is given by the concentration of hydroxide ions, or OH- ions, in the solution. A solution of NaOH with a concentration of 0.001 mol/L has a pOH of about 3 since NaOH almost completely dissociates into its constituent ions in aqueous solution. The pH of the solution at room temperature is then obtained by subtracting the pOH from 14, giving 11 in this case.

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What do geological principles tell you about inclusion?

The geological principle of inclusion is only one of several principles geologists use to estimate the relative age of rocks. One of the simplest of these other principles is the principle of superposition. The principle of superposition states that in layered rocks, each layer is younger than the one below it. The principle of horizontal layering states that sediments are deposited in flat, nearly horizontal layers, so if layers of rock are inclined or folded, this occurred after they formed. The principal of original continuity states that, over any flat area, sediments are deposited relativ..

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How can you convert between milligrams and milliliters?

The milligram (mg) and the gram (g) are both measurements of weight or mass in the metric measurement system. One gram is equal to 1000 milligrams. The milliliter (ml) is a measurement of volume in the metric measurement system. One milliliter is equal to 1 gram; there is a 1:1 ratio between the two units of measure. To convert an amount from milligrams to milliliters, divide the amount by 1000 to convert to grams, and divide the new amount by 1 to convert to milliliters.

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How is HBr explained in chemistry?

Hydrobromic acid is one of seven strong acids; these are acids with a pKa value that is less than -1.74. The pKa value is related to the value Ka, which is called the acid dissociation constant. Hydrobromic acid has a pKa value of -9, making it one of the strongest strong acids. As a strong acid, HBr completely dissociates one ion when it forms an aqueous solution. That trait means that when HBr is added to water, H2O, it results in a positively charged H3O ion and a negatively charged Br ion.\nHydrobromic acid can be formed by the reaction between dibromine, sulfur dioxide and water. It can a..

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