Unit 2 Chemistry Test | Study Guide & Practice Questions

Unit 2 Chemistry Test | Study Guide &
Practice Questions




Energy - ---✔✔✔ANSWER----The ability to do work



Work - ---✔✔✔ANSWER----Force acting through a distance



Force - ---✔✔✔ANSWER----Any push or pull



Proton - ---✔✔✔ANSWER----Nucleus; positive; 1 amu; = atomic number

, Neutron - ---✔✔✔ANSWER----Nucleus; neutral; 1 amu; = atomic mass-
atomic number



Electron - ---✔✔✔ANSWER----Energy levels; negative; negligible mass; =
number of protons (atomic number)



Atomic Number - ---✔✔✔ANSWER----# of protons



Atomic Mass - ---✔✔✔ANSWER----Weighted average of all isotopes

Ex. Carbon 12, 13, 14



Dalton's Atomic theory - ---✔✔✔ANSWER----Elements = indivisible
paricles called atoms;
Atoms of an element are identical (same mass) and atoms of different elements
have different masses;
Compounds form when atoms of different element combine;
Atoms of element don't change into different types of atoms in a chemical
reaction



Isotope - ---✔✔✔ANSWER----Atoms of same element with same number
of protons but different number of neutrons