Chemistry Ch1
Terms
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- atom
- basic building block of matter, smallest unit of chemical element
- What is the atom composed of?
- protons, neutrons, and electrons (subatomic particles)
- Protons and neutrons form the
- nucleus
- The electrons exist outside the nucleus in regions of space called
- orbitals
- What shows similar chemical properties and cannot be broken down further by chemical means?
- element
- What is the charge and mass of a proton?
- positive and 1 atomic mass unit
- atomic number
- number of protons found in an atom of that element
- What is charge and mass of neutron?
- no charge and mass slightly different than proton
- isotope
- different number of neutrons but same number of protons.
- mass number
- equal to the number of protons and neutrons
- Convention X with Z on bottom and A on top
-
X is the element
Z is the atomic number
A is the mass number