The natural abundance of the three stable isotopes are 90.92% isotope A (19.9924 amu), 0.3104% isotope B (20.9938 amu), and 9.1784% isotope C (22.0330 amu). Calculate the relative (or average) atomic mass of this element and compare your value with that given in the Periodic Table to identify the likely element. (Note: The units of atomic mass are atomic mass units (amu)

The average atomic mass of lithium is 6.925 amu. Lithium has two natural isotopes. The larger one has a 92.5% abundance and is 1 u larger than the smaller isotope. Dtermine the isotopes.

A fictitious element Z has an average atomic mass of 223.67 u.223.67 u. Element Z has two naturally occuring isotopes. The more abundant isotope has an exact mass of 224.29 u224.29 u and a relative abundance of 60.99%.60.99%. Calculate the exact mass of the second isotope.

(1) are composed of only one type of atom and we form (2) when we combine two or more of it. These atoms combine and stick to each other because of (3). Two or more (4). that are not chemically combined make up a (5) Its composition could be uniform as (6) which is also known as (7) and can also be non-uniform, which are called (8) These can further be classified into either (9) or (10). The characteristics that matter exhibit is better known as its (11)_ (12) are characteristics that could only be observed with a change in the molecular composition while (13). are the ones that doesn't require it. Furthermore, characteristics that change when the mass changes are called (14)_ while characteristics that are independent from these changes are called (15)