Periodic Table Scavenger Hunt: Fill & Download for Free

Here are just a few of the many various activities, groups, and ways Quora helps build internal rapport:Onboarding:New hire welcome at our weekly all-hands meetings where you stand up, introduce yourself, and give the company one fun fact about yourself.New Hire classes that are shared across all functions (there are some function-specific ones as well, but the general ones are great for meeting new coworkers). I stay in touch with my “class” (those who started on the same day as me) and we have monthly lunches together as well as a slack channel that we keep up with goings-on in.“Quora meets Bagel” — twice weekly lunches for your first couple of weeks where you’re matched up with longer tenured employees to have lunch and chat. (You can also choose to keep doing these indefinitely!)Ongoing:Interest groups and clubs that meet both during the day and after work to cultivate mutual interests and gather socially. Just a handful off the top of my head: coffee lover’s club (meets monthly to test different types of coffee beans and preparation methods), badminton club, running club, baking slack channel (swapping recipes, pictures, and frequently bringing in test batches to share with coworkers), climbing club, Quora Cares (our employee-led group for volunteering and giving back to our local community), Whiskey Friday, Chocolate Sync, and Gaming Slack channel.Team off-sites for both working brainstorms and planning as well as sheer fun and team-building. Some favorites I’ve seen or been on: zip-lining, chocolate making, whiskey tasting, succulent garden-making, caramel making class, improv workshops, and graffiti art classes.Weekly Q&A with the entire company where everyone can submit questions for our executive team, our CEO, or just anyone at the company. This helps build our culture of awareness and open dialogue.Open office environment — no one here has an office or a cubicle; all desks are out and we sit mostly grouped by teams. This allows us to work well collaboratively even without being in a formal meeting or conference room.Open collaborative areas for working. All around our office, we have various couch setups where we can sit and work in an even more casual environment. This leads to a lot of great chat between functions and makes even IC work feel social when you want it to.Monthly birthday celebrations — every month, there’s a birthday cake to celebrate the birthdays for that month. Everyone’s invited to eat cake (of course!) and if you’re around and free, we gather together to sing and eat cake.Various interest Slack channels — for everything from Silicon Valley observations to #parents, we have a large number of slack channels for employees with shared interests to chat. These help keep us connected and allow us to build connections beyond job function or everyday schedule-crossing.Offroad weeks — these are our hack weeks, and they generally occur about three times a year. During those times, we’re encouraged to create projects (generally around a certain theme, but also freeform projects are allowed as well) and teams to work together, especially crossfunctionally or with people from other teams. The offroad week will be themed, and there are challenges throughout the week (like scavenger hunts, flag making contests, etc) as well as fun snacks throughout the day and decor around the office to match. At the end of the week, teams present their projects and compile documentation about them. Some projects eventually make their way to become a part of the actual product.Vacation Tax — when we travel, it's a Quora tradition to bring back a treat from where we've been to share with the team. We have a “Vacation Tax” table on each floor, and you'll often find goodies from various people returned from PTO as well as the baked goods from the bakers at the company. This makes those areas a good place to chat with coworkers after someone posts in Slack that they've just put out a treat from Tokyo for people to try.Holiday party, Anniversary party, Halloween, etc — we love a good excuse to dress up, whether it’s formal or costume attire, and at events like our Holiday and Anniversary parties, plus ones are also welcome, meaning we get a chance to meet the significant people in each other’s lives as well. (Fun fact, my youngest sister has been at two consecutive holiday parties now, once with me, and once with her boyfriend, who also works here, and both times, my coworkers are confused and can get us confused if we’re not standing together!)Annual retreat — we're getting bigger, but so far, we've managed to do an all-company annual retreat every year. This is a non-working retreat (aside from on-calls, of course), and it's a period of three days (late spring, usually) where we go as a company and stay together and enjoy getting to better know each other and strengthen existing relationships. This past year, we went up to Tahoe in May and enjoyed the beautiful scenery, hikes, kayaking, and watched the season premiere of Silicon Valley together (of course!). This is an intense rapport-building time and forges some really great connections.Overall, the culture of Quora is such that building relationships across the company and regardless of level is the norm. Although the company has increased greatly in size since I first began working with Quora in 2012, it still retains much of the small team feel that I really love. Getting to know my colleagues across the org has been one of the greatest joys of working full-time in the office for the past year and made all the work I do and the projects I participate in much smoother and more enjoyable for the good rapport that we have.

Lead is an inherently effective material. A lot of it has to do with availability and cost effectiveness. Lead is a naturally plentiful metal found on earth making it cost effective. Lead is soft and has a low melting temperature which makes it very easy to work with. The softness also prolongs the life of a firearm's rifling. Lead has a fairly high density which makes it penetrate more deeply through the fleshy things we humans hunt without the need for any special bullet design. The only real performance downside to all lead bullets is the fact that they shouldn't be used at higher rifle velocities since they're too soft. Lead works very well below about 1500 feet per second though.Now what about alternatives?Take a look at the periodic table, lead is Pb, number 82 in the blue post transition section. Then look at this chart: The chemical elements of the periodic table sorted by density.If you're looking for a metal with similar softness and similar density properties then silver and gold both really stand out. Silver is just a little harder and less dense than lead. Gold is much denser and again a little harder. Unfortunately gold is rare and very expensive and is a wonderful corrosion resistant conductor, making valuable in the electronics industry. Silver is much cheaper than gold but still orders of magnitude more expensive than lead. Silver also has a much higher melting point than lead. It would have to machined to make effective bullets, driving up the cost of silver bullets further.Most of the other heavy metals that high on the chart are unsuitable for bullets. Bismuth is relatively nontoxic, but unfortunately it is somewhat unsuitable for conical bullets because it is brittle, it works well for shotguns though. Thallium is even softer than lead and a little denser, but is uneconomical, extremely toxic and water soluble (though some would say this makes it more suitable for killing things). Mercury is liquid and toxic. Platinum is nontoxic and extremely dense but rare, too hard and very expensive. Polonium is just a little denser than copper and radioactive.Which brings us to all the lead alternatives that are actually used and environmentally friendly:The first is jacketed lead!Looks like those bullets are mostly copper right? In reality they're mostly lead and the outside is a thin jacket of copper. It allows the bullet to be driven faster than 1500 feet per second and makes the bullet much more environmentally friendly. These bullets are actually much more common than all lead bullets and are available for both handguns and rifles. While they're hard for an individual to make from raw materials for their personal loading, they are affordable to make using mass production methods. Jacketed bullets work well and have been used for over a century.Next we have all copper bullets:An all copper bullet is more expensive than jacketed lead, but even more environmentally friendly. Recent developments in manufacturing technology have led to copper bullets that perform differently, but equally effectively when compared to traditional lead or jacketed bullets. The only real downside of copper is it somewhat decreases barrel rifling life and must be made physically longer to achieve the same mass as traditional bullets with lead in them.The US Army recently adopted the ammunition above: M855a1. It uses a copper bullet with an exposed steel penetrator. While it apparently has better terminal performance than original M855, the intent was for the Army to adopt a lead free bullet. It hasn't really been around long enough for most people to have informed opinions about it, so the jury is still out. But it sure is ecologically friendly.Speaking of steel, what about that affordable metal?Around 1990, federal regulations were adopted outlawing the use of lead shot on waterfowl. That left steel shot. This frustrated many hunters since steel shot has a shorter range and less penetration compared to lead shot of the same size and velocity. Why you might ask? Bird and buckshot are both spheres, spheres slow down much more quickly than more cylindrical bullets because spheres have comparatively terrible sectional density values. Early steel shot was also hard on shotgun barrels. Over the last 25 years, steel shotshells have progressed leaps and bounds and are now just as viable for hunting most birds as lead shotshells.While lead buckshot is much less of a problem for scavengers than lead birdshot, some people might view buckshot as a problem too. Unfortunately steel buckshot can not progress in the same way as birdshot has because of physical size limitations. Tungsten based alloys have been used successfully for buckshot instead. These tungsten rounds are a little heavier than lead and currently around 3-4 times more expensive. There's another more unusual option about the same price as tungsten shot though.These are flechettes, they're basically hardened steel darts packed into a plastic shotgun wad to protect the barrel. They can fly fast with flat trajectories, have long range, penetrate deeply and cause lots of bleeding. But flechettes in general have very mixed reports because of one big factor: most commercially manufactured flechette ammo is made incorrectly. To work as intended the flechettes MUST be packed with all points facing forwards. Many commercial manufacturers instead pack the flechettes into the shell with points both forwards and backwards to fit more in. You would think it would be common sense to launch an aerodynamic dart point forwards so the fins provide stability, but apparently some people have never shot an arrow or played darts before. In any case, there is one outfit loading high quality flechettes correctly, so for anybody interested you can visit the following address: http://www.antipersonnel.net/sdllc/005.htmlSteel bullets for pistols are perfectly viable with the proper design. They're seen overseas particularly with the Russian military. But steel pistol bullets are illegal here in the US because of laws against "armor piercing handgun ammunition". All steel rifle bullets aren't really used as far as I know. Most rifle bullets that do include steel use the steel as an armor penetrator like the M855a1 seen above.That about wraps up everything important I can think of regarding non lead bullets. If anyone comments something pertinent I missed, I'll edit it in.

oKAY, SO LET ME TEL YOU , in my college , our coommittee (which I wasn’t a part of :( sadly ) conducted following events :Byomcase (a mystericl case solving )Periodic Table (ITS A TYPE OF board games, wherre you have to create any number of words from elemnts..make your rules of using the letters accordingly.Logo QUIZZES (any informal can do)Junkyard Wars(Load your canons…Fire it)Grow the crystal ..(where chemicals were provided by college itself & you have to just go n grow them :p i dont know how)Chem-e-Snap (capture a photo which shud connect to GREEN CHEMISTRY THEME)CHEM ZIPLINER (Build a prototype that can move on a zipline(rope ) using chemical reaction as a thrust PS- myy team ranked 1st :)SCAVENGER HUNT: 2 rounds;in 1st round - quiz of 20 quesin 2 round- members need to folow the clue to reach final destination.(here we played in campus area itself)Sayonara ! :)