Provide the isotopic symbol for Magnesium. Note:  the top box is blank 1 and the bottom box is blank 2. _______ _______

The calculation performed to the proper number of significant figures is: 50.596 g – 10.0 g = {“version”:”1.1″,”math”:”50.596 g - 10.0 g = ”}

Naturally occurring boron consists of two stable isotopes:  10B with a mass of 10.0129 amu and 11B with a mass of 11.0093 amu.   Without doing calculations, you could conclude that the most abundant isotope is:

Ions are atoms that have gained or lost electrons.

Which part of that atom accounts for the majority of the atoms weight?

Using the pH table below, which items is the most acidic?

Sugar dissolves when stirred into coffee. The coffee is the , the sugar is the , and the sweetened coffee is the .

Identify two components of the biosphere in the image below and two components that WOULD NOT be part of the biosphere. You must state things that are in the image, you cannot speculate that there are other hidden things.

What pH is considered neutral?

Which type of chemical reaction is depicted below?