0.0082 You have to equal out the amount of concentration with the unknown
Pajamas
Out fit for each day + 2 extra
Athletic clothes
Light hoodie
Bathing suit + cover up
Underwear
Socks
Bra's
Sunscreen
Moisturizer
Makeup
Makeup remover
Shampoo + conditioner
Shaving cream
Razor
Medicine (pain meds, etc.)
Lotion
Chapstick
Retainer (if you have 1)
Tooth brush + toothpaste
Deodorant
Monthly Items
Phone charger
Computer + computer charger
Camera + camera charger
Headphones
Water bottle
Snacks
Perfume
Book
Glasses
Purses
Jewelry
Watch
Wallet
Hat
Sunglasses
Hand sanitizer
Tennis shoes
Walking shoes
Flip flops
Blow dryer
Straightner
Hair clips
Hair ties
Hair brush
Hair spray
Heat protection
Have music + shows/ movies downloaded
Hope this helps you take off anything you don't want or anything you don't need
Answer:
Rubidium-85=61.2
Rubidium-87=24.36
Atomic Mass=85.56 amu
Explanation:
To find the atomic mass, we must multiply the masses of the isotope by the percent abundance, then add.
<u>Rubidium-85 </u>
This isotope has an abundance of 72%.
Convert 72% to a decimal. Divide by 100 or move the decimal two places to the left.
- 72/100= 0.72 or 72.0 --> 7.2 ---> 0.72
Multiply the mass of the isotope, which is 85, by the abundance as a decimal.
- mass * decimal abundance= 85* 0.72= 61.2
Rubidium-85=61.2
<u>Rubidium-87</u>
This isotope has an abundance of 28%.
Convert 28% to a decimal. Divide by 100 or move the decimal two places to the left.
- 28/100= 0.28 or 28.0 --> 2.8 ---> 0.28
Multiply the mass of the isotope, which is 87, by the abundance as a decimal.
- mass * decimal abundance= 87* 0.28= 24.36
Rubidium-87=24.36
<u>Atomic Mass of Rubidium:</u>
Add the two numbers together.
- Rb-85 (61.2) and Rb-87 (24.36)
Answer:
D
Explanation:
Metallic character decreases as you move across a period in the periodic table from left to right. This occurs as atoms more readily accept electrons to fill a valence shell than lose them to remove the unfilled shell. Metallic character increases as you move down an element group in the periodic table. This is because electrons become easier to lose as the atomic radius increases, where there is less attraction between the nucleus and the valence electrons because of the increased distance between them.
