WORKSHEET 1 - Atoms, Molecules and Names
Use your Periodic Table to answer the following questions.
2. The Period 3 Halogen is ______.
The Period 2 Alkaline Earth Metal is ______.
The Period 5 Noble gas is ______.
The Period 6 Alkali Metal is ______.
The lightest Transition Metal is ______.
3. Using the Periodic Table, fill in the missing information in the chart, below.
Symbol / atomic mass / protons / neutrons / electrons / chargeW / 184 / 2+
35 / 45 / 0
197 / 118 / 78
128 / 52 / 54
4. Which is more abundant, 72Ge or 73Ge, assuming that these are its only two isotopes?
5. In nature, 20.3% of Boron exists as Boron-10 (10.0129 amu) and the remainder is Boron-11 (11.0093 amu). What is the average atomic mass of Boron?
6. How many moles of Ni are present in 25.67 g of Ni?
How many atoms of Ni?
7. Which of the following represents more atoms, 3.47 g of He or 1.35 g of Ti?