List three ways in which metals and nonmetals differ.

9) Explain to me why the atomic radii decrease as you move across a period rather then up a group or family?

A neutral atom has the following electron configuration: 2. 4. What is the chemical symbol for the atom?

A monatomic ion with a charge of -2 has an electronic configuration of 1s22s22p63s23p64s23d104p65s24d105p6.This ion is a(n) _______cation anion.What is the chemical symbol of the noble gas this ion is isoelectronic with? Xe.What is the formula of the ion? Ba2+.

SCH4U

Which of the following elements would be expected to have the greatest nonmetallic character? Group of answer choices Al In B Ga

1) In the past you have learned that bismuth (Bi) is a metal that can lose 3 electrons and become Bi* . Actually, Bismuth is able to form 3 ions! The charges for each of the ions are 3-, 3+ and 5+. Propose electron configurations (long form only) for each ion. Explain the reasoning behind your configurations. Be sure to include the electron configuration of the neutral atom. Atom/ Electron Configuration (shorthand only) Reasoning for electron configuration of each ion Ion Bi (neutral) Bi3- Bi3+ Bi5+

Discuss one major difference between the classical theory of the atomic model and the quantum theory model in our understanding of the atomic structure.