The Periodic Table Unit Test
1. Which statement about metals and nonmetals is correct?
*Metals can be hammered into thin sheets, and nonmetals are brittle.*
2. Based on properties of elements in the periodic table, which element is the best conductor of thermal energy?
*vanadium (V)*
3. Which element has four valence electrons?
*silicon (Si)*
4. Which statement best explains why hydrogen’s atomic number is equal to its mass?
*Hydrogen does not have any neutrons.*
5. Which statement correctly compares the valence electrons for atoms of francium (Fr) and barium (Ba)?
*Francium has fewer valence electrons, but they are in a higher energy level.*
6. Gallium has an atomic number of 31 and a mass number of 70. Which table shows the number of protons, neutrons, and electrons in a gallium ion with a +3 charge?
*protons 31, neutrons 39, electrons 28*
7. Which is true about about stable isotopes?
*A stable nucleus has a similar number of protons and neutrons.*
8. On which atomic property proposed by Henry Moseley is the current periodic table of the elements based?
*atomic number*
9. Which incorrect aspect of Rutherford’s model was fixed by Bohr’s model?
*Electrons move freely in curved paths around the nucleus.*
10. You plan to pass alpha particles through a field that contains a consistent type of particle. Which configuration will result in the largest deflection of alpha particles?
*low-energy alpha particles passing through a field of high mass-number-particles*
11. Where on the periodic table do you find elements that have full valence electron shells?
*on the right side of the periodic table*
12. Which element would have a full outer shell of electrons if it gained three electrons?
*nitrogen*
13. Which group of elements has the most similar chemical properties?
*fluorine, chlorine, and iodine*
14. Group 2 elements have two valence electrons. Which kind of bond will they most likely form, and why?
*An ionic bond is likely because they will want to give away two valence electrons in order to become stable.*
15. An element has six valence electrons. Which ionic charge will its ion carry?
*2–*
16 and 17 are writing.
These are the correct answers for The Periodic Table Unit Test.
