1) Electrons are involved in bonding.
Steps to electron dot diagrams and why atoms bond (or don’t)
Chemical symbols, valence electrons
2) What is a chemical symbol?
3) Copy atom and write its chemical
Hydrogen ___ helium___
Lithium ___ boron ___
Carbon ___ nitrogen ___
Oxygen ___ fluorine ___
Neon ___ sodium ___
Silicon ___ chlorine ___
4) By structure, which electrons in an atom could bond?
ONLY the outer ring of electrons.
5) Valence electrons – the electrons in the outer ring (count from left on Periodic Table)
6) Hydrogen has ______ valence electron(s).
7) Helium has ______ valence electron(s).
Carbon has ______ valence electron(s).9) Fluorine has ______ valence electron(s).
10) Neon has ______ valence electron(s).
11) Most ionic compounds have a regular ________________
P. 256 12) Covalent compounds come in ______________
P. 258
13) metallic bond
HW: Use a complete sentence to answer questions 1 - 3
From Tuesday:
Read pp. 248 – 256
P. 248 Use a complete sentence to answer 1-3 and challenge question
1) In CO2, the ratio of C to O is?
1 C to two oxygen
2) In CH4, the ratio is?
3) In H2SO4 the ratio of H to S?
**The ratio of S to O?
4) Challenge: which two compounds in the table have a 1:1 ratio of carbon to oxygen?
5) ionic bond
6) covalent bond
7) molecule
polar covalent bondHomework: bring to class completed Thursday
P. 256 Use a complete sentence to answer 1-3
Please staple / add to Tuesday’s assignment

