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Selenium
Selenium (Se) is a nonmetal (recognized a metalloid) related to sulfur and is often used in glassmaking. Although it can be toxic, it is needed in trace amounts for proper body function.
424 Questions
What is the four quantum number of selenium?
The four quantum numbers of selenium are:
- Principal quantum number (n) = 4
- Azimuthal quantum number (l) = 1
- Magnetic quantum number (m_l) = -1, 0, 1
- Spin quantum number (m_s) = +1/2, -1/2
How many elements are made by man from the periodic table?
Man has not "made" any eleents, but many of the elements on the periodic table do not naturally occur in their purist form in the crust, and some are so unstable that they can only exist for a few seconds after we have produced them in a reaction.
What does selenium do for cattle?
Selenium is a micro-mineral that forms part of a number of enzymes and other proteins in bodily tissues. In particular, it's a component of the enzyme glutathione peroxidase (GSH-PX), which inhibits and destroys naturally occurring peroxides that cause cell damage. It also acts in conjunction with vitamin E to protect cell membranes including cell walls. This protection is particularly important in muscle cells that work hard and consume large quantities of energy and oxygen. A deficiency in selenium is most noticeable in newborn calves, and is called "white muscle disease."
Which in good between QTP or Selenium?
QTP and Selenium are both testing tools. Both are different as different companies provide it.
How do alternator diodes work?
Diodes allow current to flow in one direction only thus changing the alternating current produced inside the "alternator", to direct current which is required by your car's electrical system.
Think of them as check valves for liquids.
Denis
Where is selenium located in the periodic table?
Selenium is located in Group 16, Period 4 of the periodic table. It is a nonmetal element with the symbol Se and atomic number 34.
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What is the electron configurations of selenium?
Atoms of the element selenium (atomic number 34) have the electron configuration
1s2, 2s2, 2p6, 3s2, 3p6, 4s2,3d10, 4p4
Germany, Japan, Belgium, Russia are the largest producers of Selenium.
What element has a greater number of protons potassium or selenium?
Selenium has 34 protons and potassium has 19. The proton number corresponds to the position of the element in the periodic table.http://www.rsc.org/periodic-table/?gclid=CjwKEAjw2MOhBRCq-Nr87_j-lDASJAAl4FNhssVbsyCT_UjwmmrpVjUngib6tHybHy88YrC1gH_1shoCZDzw_wcB
What is the recommended daily intake of carbon?
Carbon is not recommended in your diet. Elemental carbon can not be utilized by your body. It does not harm you if you take powder of carbon in your diet.
What is the name formula and uses for one compound that selenium contain?
Selenium dioxide (SeO2) is the most widely used selenium compound in industry. It is used as an oxidising agent in drug and other chemical manufacture, a catalyst in organic syntheses, and an anti-oxidant in lubricating oils.
What is selenium's malleability?
Selenium is a brittle metalloid, not malleable like metals such as copper or gold. It can easily break, crumble, or be powdered under pressure instead of flattening or bending.
- This is not as easy as it looks and I do feel for you hon. A group of girls can sometimes be more nastier than a group of guys and it's getting worse. "It takes a fool to be cool" and these girls are young, unintelligent and are trying to be cool. Inwardly I bet there are at least one or two of those girls that feels badly this is happening, but want to please the group they are with. Don't beg them to stop bothering you because this will inflame them even more. Sometimes ignoring them doesn't help either because they always manage to single the person out. I suggest you stick with another friend or friends and walk together. You are less likely to be tormented as much. Remember, school isn't forever and to you and to these bullies this will be but a faded memory in another year or so. Also, if they can't get a rise out of you they will eventually end up picking on someone else. Walk tall, stare 'em straight in the eyes and don't walk around hunched over!
- You can tell the girls nicely to please stop. You can tell some you know and trust to help you and you can try making friends with the girls. You can walk away from the girls when ever they come near. you can make sure that the girls don't know that they are bothering you because when they see that you are scared that is fun for them, so if they don't know they aren't bothering you then they with stop bothering you and they will move on.
- I'm 13 years old too and I used to get bullied a couple years ago. I was shy and didn't say anything if I was getting bullied. My trick is to not suck up to them. Be nice to them first and say just please stop. If they don't listen and keep going, with a little smirk on your face say " I honestly don't know why you people do this, does it give you satisfaction? Does it make you feel big and strong? Well I'm going to tell you something, you all aren't satisfied with yourselves. I think, there's a big black hole that you are trying to fix by going around and trying to put people down. Just stop! We all know the reason for bullying which is either jealously, or past experiences. It's either you stoptaking this anger out on me, or just keep it to yourselves or we become friends."
- I stand up for myself and I never let anyone put me down. You just have to build your confidence. You don't needthem, you shouldn't ever be in contact with someone that tries to make you feel less of a person. Everyone deserves respect. Trust me you don't need or want anyone like that. They just have inner anger with themselves. So I guess they decided to make a group to put people down. Try to avoid people like that.
- There's lots of things you could do, you could walk away, you could tell them off, must be very hard for you because you may feel like you are outmatched because these girls could be a clique. My advice would be this: if they bully you at a specific time, say, on the way to school or at the bus stop, you could ask a good friend to be by you. Another trick would be these clever comebacks :
- Simply disagree (Ex: Say, "I don't think so"
- Acted surprised.(Try, "I can't believe you just said that!"
- Let them have their own Point Of View (Something' like "That's your opinion")
- Ask a question, such as, "Was that really necessary? Really?
- Use the one word technique, like, "wow"
- Question the teaser ("That doesn't even make sense")
- Say the teaser's name "Monica!"
- Look confused, just say, "What????????" (Say this over if you need to.)
- If these girls are teasing you about your body (like because your chest is flat or your too fat or too skinny) you should tell, no matter how scared you are, because that is called harassment and its illegal in schools. They may think of it as "good fun" but its not.
- Remember, the "it's wrong to hit girls" rule does not apply if it's in self defense. In a fight, there is no gender. Only you and the opponent.
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What mon atomic ions do barium and selenium make?
An ionic compound, Barium selenide or BaSe is formed, with the ions Ba2+ and Se2-.
How do you make pure samples of selenium?
One common method to obtain pure samples of selenium is through the process of sublimation. Selenium can be heated to a temperature where it vaporizes and then allowed to condense back into a solid state in a clean container, resulting in a relatively pure sample. Further purification techniques such as recrystallization or distillation may also be employed to increase the purity of the sample.
What happens when selenium is exposed to light?
Selenium is photoconductive, meaning its electrical conductivity increases when exposed to light. This property is used in applications such as photocopiers and solar cells. However, prolonged exposure to bright light can degrade selenium's performance.
Is light urine color during pregnancy ok?
Pregnancy doesnt affect the colour of urine. lighter urine probably means you are drinking enough fluid.
Oxygen sulfur and selenium belong to group 16 on the periodic table What does this indicate?
Group 16 elements have 6 valence electrons and share similar chemical properties, such as forming -2 ions. Oxygen, sulfur, and selenium are nonmetals that commonly form covalent compounds and have a tendency to gain electrons to achieve a more stable electron configuration.
