fourth period
The third period is similar to the second, except the 3s and 3p sublevels are being filled. Because the 3d sublevel does not fill until after the 4s sublevel, the fourth period contains 18 elements, due to the 10 additional electrons that can be accommodated by the 3d orbitals.
Answer:
A rule of thumb is that 1.5 lbs. of baking soda per 10,000 gallons of water will raise alkalinity by about 10 ppm. If your pool's pH is tested below 7.2, add 3-4 pounds of baking soda. If you're new to adding pool chemicals, start by adding only one-half or three-fourths of the recommended amount.
1. Decreases by 4. (B)
2. The atomic number changes. (B)
3. 56/26 Fe. (C)
4. Potassium-40;t1/2=25 days. (B)
5. Takes place in the upper atmosphere. (A)
The answer is experimentss
You want to convert Euros / kg to Dollars / pound
So you'll have to multiply the price (Euros / kg) by the exchange rate (Dollars / Euro) to get a number that has units of Dollars / kg.
Euros Dollars Dollars
------- x --------- = --------
kg Euro kg
Then you have to multiply the number of kg in a pound (which has units of kg / pound) to get a number in units of Dollars / pound. This number is 2.2.
Dollars kg Dollars
-------- x -------- = --------
kg pound pound
So the answer would be 1.75 * 1.36 / 2.2 = 1.08 dollars / pound.
