Test - Atomic Structure Flashcards
2. The measurement of how much matter an object contains is its
Mass pg. 18
3. All elements are composed of extremely small particles called
Atoms pg.18
4. Each family in the periodic table has its own characteristic properties based on the number of
Valence electrons pg.18
13. The total number of electrons in the outer shell of a sodium atom is
- Pg.16
15. The total number of neutrons in the nucleus of any atom is equal to
Mass number minus the atomic number pg.15
16. The maximum number of electrons that can occupy the 2nd shell of an atom of magnesium
- Pg.16
18. An unstable nucleus results from too many or too few….
Neutrons pg.18
20. Which word below is represented by the word “period” on the periodic table?
Energy level pg.18
25. When looking at halogens on the periodic table, how does the number of valence electrons change as the energy level is increased?
The total number of valence electrons does not change. Pg.13
31. What elements would be the most reactive?
Iodine. Pg.17
32. What elements would be the least reactive?
Silicon pg.17
37. Arranged the elements on the periodic table based on atomic number
Henry Mosley flash cards
38. Solid Sphere model; elements are atoms with different masses
Dalton flash cards
39. Electron Cloud model; surrounding the nucleus is an electron cloud made of shells
Shridinger and Heisenberg flash cards
40. Nuclear Model; gold foil experiment allowed him to discover that the nucleus was the psotitively charged center of the atom
Ernest Rutherford flash cards