3. This element NOT a metal and is the last element in Period 2. Which is it?

O Ne

В

ОО

Li

Radioactive isotopes have been used commercially in: smoke detectors older watches with luminescent dials sterilization of food all of these applications

How many moles of water are in 24.3 grams of water?

During a lab experiment with magnesium and hydrochloric acid, Curious Carl observed bubbles being produced. He identified the gas as being hydrogen. The formula is: Mg + 2HCl → MgCl2 + H2 (g) - What is the mass in grams of two moles of HCl? A. 18.

What is the periodic table of the elements and how is it used?

Both obsidian and pumice are formed from which of the following? - Ocean sediments - Earthquakes - Flooding - Volcanoes

The volume of 1 mole of o2 gas at T=273k P=1atm is? A 6.02 x 10^-23 ml B 760 L C 22.4 L D 2.24 L E 224 L

There are two stable isotopes of bromine. Their masses are 78.9183 and 80.9163 amu. If the average atomic mass of bromine is 79.9091 amu, what is the natural abundance of the heavier isotope? percent abundance of 81Br __%

If 1.00 mol of argon is placed in a 0.500-L container at 20.0 ∘C, what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation) ? For argon, a=1.

Which of these is a covalent compound? 1. AICI3 2. CO 3. MgO 4. LiCI

What is a protein used for