MidTerm Exam Practice Questions:
1. Round this number to three significant figures : 145.20
2. 1 mL = 1 cm3......So, convert 24.0 cm3 to liters
3. If an object has a density of 7.37 g/mL and a mass of 55.0 g, calculate the volume by changing the equation ;
D = M/V
4. If an element has an atomic number 20 and has 18 electrons it will be what type of ion?
5. The electrons in the outer energy level are called :____?
6. What is the chemical formula for Sodium Trioxide?
7. What is 0.000345 expressed in exponential notation?
8. Find these elements on the Periodic Table : K, Zn, Sb, S , c Br, Cu, Cs, Ce, Ar, He, F, Fe, Ca, Mg, Na Describe if they are metals, metaloids or nonmetals
9. What is a diatomic molecule?
10. Be able to name the number of neutrons, electrons, and protons in an element.
11. Name the groups of elements found on the periodic table. Review some of the elements in those groups.