Chapter 2 - Chemistry Flashcards
Elements can’t…
be broken down
Atoms have…
protons (1), neutrons (0), electrons (1)
Where are protons and neutrons?
in the nucleus
Where are electrons?
around the nucleus
What are compounds?
2+ elements of atoms joined be chemical bonds
What is in a molecule?
2+ atoms held together by covalent bonds
What are ions?
ions are elements that have a charge
What are exergonic reactions?
chemical reactions that release energy
What are endergonic reactions?
chemical reactions that absorb energy
What is an activation energy?
the amount of energy needed for a chemical reaction
What do catalysts do?
they lower the activation energy
What do the numbers on a Ph scale mean?
14 is basic 1 is acidic
What do buffers do?
they make less Ph change when either base or acid is added
what is the difference between a solute and a solvent?
a solute is being disolved into a solvent.
