Chapter 2 Flashcards
What is a compound?
A substance consisting +2 different elements
What are the 4 essential elements?
Hydrogen, Oxygen, Nitrogen, and Carbon
What is a trace element?
An element required in minute quantities
What is found in an atomic nucleus?
Protons, electrons, and neutrons
What is the unit of measurement in atoms called?
Daltons
What is the mass number of an element?
Protons + neutrons
What is the atomic number of an element?
The number of protons/electrons
How can we find the number of neutrons?
Mass number - atomic number
What is an isotope?
Atoms of the same element can have different number of neutrons/mass weight
What are the properties of a radioactive isotope?
Nucleus decays spontaneously, changes the number of protons, and changes into a different element
What is measured in radiometric dating?
how many Half-lives that have passed
What is potential energy?
The energy a matter possesses because of its location
