Elements & Atoms
Home > Preview
The flashcards below were created by user
on FreezingBlue Flashcards.
Smallest part of an element that keeps it unique. Nucleus is at the center, with electrons circling at various energy levels. Made of 3 particles.
+, found in nucleus, 1 amu
=, found in nucleus, 1 amu
-, found in energy levels, amu 0
Why is an atom neutral overall?
Protons and electrons with opposite charges have equal numbers in an atom.
Substance that can't be broken into simpler substances
- Made of one type of atom.
- Periodic Table lists all known elements.
- 1st letter uppercase, 2nd lowercase
- e.g. Na
Protons in an atom, and electrons in an atom that haven't bonded
- Round to nearest whole # for most common mass.
- Mass # = p+ + n0
Atomic Mass Unit:
Average mass of atoms
(Cell on Periodic Table)
- 7--Atomic #
- N--Element's symbol
- Nitrogen--Element's name
- 14.01--Atomic Mass
What would you like to do?
Home > Flashcards > Print Preview