[21.39] Rates of Radioactive Decay (Section)
Radium-226, which undergoes alpha decay, has a half-life of 1600 yr.
(a) How many alpha particles are emitted in 5.0 min by a 10.0-mg sample of 226Ra? (b) What is the activity of the sample in mCi?
Things I Enjoyed in Portland (in no particular order) 1. Pioneer Courthouse Square—this is a hub for the MAX station because you can switch to a bunch of different lines here. There’s also events that happen here and festivals sometimes, as well as a visitor’s center where you can get a map. 2. Voodoo Donuts a. Keep Portland Weird Sign is in that area. It’s in a strange part of town that is very Portland-esque. 3. The International Rose Garden a. So many roses. It’s a really pretty place! Downtown Portland 4. Powell’s Bookstore a. This place is ENORMOUS. You can literally get lost in Powell’s! One of my favorites. 5. Director Park a. There’s a life-size chess set here, so that’s cool. b. There’s also a sitting area nearby that Zoe Deschanel supposedly visits frequently. 6. NE Portland a. This is the HIPPEST part of Portland; tons of shopping, restaurants, breweries, food trucks. Go to Alberta Street. b. There’s a place called Pine State Biscuits and it’s one of the only southern-comfort food places in Portland. It’s good; they have sweet tea sweetened with honey. 7. Nature Things a. Multnomah Falls. I didn’t get to go, but this is the big waterfall that everyone goes to see. b. Mt. Tabor c. Trillium Lake—I went here. We rented a car and it wasn’t a super far drive. It’s very pretty, there’s a gorgeous view of the mountain, and it’s a great place to take pictures. d. Astoria, Oregon—this is where they filme