Accidents happen in the chemistry room. Which of the accidents below do you need to let your teacher know?

• You smell gas

• You spill an entire bottle of a chemical

• You break glassware

• Your lab paper gets wet

• A fire erupts in the classroom (no matter how small/large)

What are the four things you should always be wearing during a science experiment?

Why is it unacceptable to eat in the chemistry classroom?

Which element is this atom picture of?

How do you determine the number of protons?

How do you determine the number of neutrons?

How do you determine the number of electrons?

How do you determine the mass number?

What is an isotope?

What is the atomic mass of phosphorus if phosphorus-29 has a percent abundance of 35.5%, phosphorus-30 has a percent abundance of 42.6%, and phosphorus-31 has a percent abundance of 21.9%?