Periodic Table
The number of electrons in the first valence shelf
What is 2 electrons?
The formula for Water
What is H2O
the number of atoms of hydrogen in methane
What is 4?
the number of electrons in halogens
What is 7?
The rule for determining electronegativity on the periodic table
What is from bottom left to upper right
substances of opposite polarity attracting to one another
What is electrostatic attraction