Chpt 1
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (9 张)
What is an Atom?
-the smallest particle to exist
How are protons, neutrons and electrons charged?
-Protons = positive -neutrons = neutral Electrons = negative
What particle (s) is in the nucleus?
• protons, neutrons
What information is in the Bohr-Rutherford (simplified model)
Nucleus: # of protons (p+) and # neutrons (n*) Outer rings: electrons (positive and negative) 2/8/8/2
How do you find the # how protons, electrons, and neutrons in an element?
Protons: atomic # Electron: atomic # Neutrons: atomic mass - # of protons
What is a Lewis dot diagram?
• simplified representation of an atom, where we show only valance electron
What are the rules for a dot diagram?
1) there are 4 side around the chemical symbol, where the valence electrons are placed 2) maximum (2) on each side 3) the valance electrons are distributed one at a time on each side before being placed in pairs
What is the exception for the dot diagram?
• Helium:
What is avagadros #?
6.022 x 10(23)