Ch. 2 Flashcards
Deals with the composition of matter and how it changes.
Chemistry
Carries oxygen to tissues, transported in red blood cells.
Hemoglobin
____ refers to the amount of a substance.
Mass
One or more of these constantly moves around the outer nucleus of an atom. Carries a single, NEGATIVE (-) charge.
Electron
____ refers to how heavy a substance is.
Weight
Carries a single, POSITIVE (+) charge. It’s large particle(s) contained in the nucleus.
P (positive) Protons.
Uncharged, thus electrically neutral. One or more contained in the nucleus of an atom.
NEUTRONS
___ ____ equals the approx # of protons and neutrons in a nucleus.
Atomic weight
When an atom gains or loses an electron, the atom becomes positively charged, what is it called?
Ion
The # of ____ equals the # of _____ in the nucleus. So the charges cancel, making an atom neutral- electrically uncharged. Unless it gains or loses an electron.
electrons, protons.
Atoms w/ same atomic number, but different atomic weights. The NEUTRONS amount differ.
Isotopes
If an atom GAINS an electron, it becomes a ____ charged ion.
NEGATIVELY
What type of bond is formed when 2 or more atoms attract each other and gain, lose, or exchange electrons?
Chemical Bond
If an atom LOSES an electron, which charged ion is it?
POSITIVELY charged ion.
A substance that cannot be broken down into any other substance. It’s composed of atoms.
Elements
