STATION 1 Understanding the Periodic Table
If an atom of Oxygen has an atomic
number of 8 that means-
E. there are 6 protons.
F. there are 8 neutrons.
G. it weighs 8 amu
H. it is in group 8.

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o

Covalent compounds: mastery test select the correct answer what is formed when atoms join together with a covalent bond? a. an ion b. a molecule c. a neutral atom d. a noble gas