뒤로Intro to AP bio
02:09
이 집합의 용어 (21)
Anything that has mass and take us space
Matter
How many subatomic Particles are atoms made out of?
3
All matter consists of
1 chemical element
Negativily charged particles of atoms with almost no mass is called
Electrons
A proton...
Has one positive charge, Has one AMU, and is found in the nucleus of an atom
Trace Elements
required for live in small amounts
Bulk elements
Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorous, and sulfur
Atomic number
total number of protons in the nucleus
Mass number
Number of protons and neutrons
The atomic number is equal to to number of
Protons only
1st shell holds up to
2 electrons
2nd shell holds up to
8
How many valence electrons does an atom of 5 total electrons have?
3
What represents regions around the nucleus In which the elections orbit.
electron energy shells
Atoms are ______ reactive when their outer shells are _____
Less, Full
Atoms of the same element that only vary in the number of neutrons
Isotopes
what kind of isotopes are unstable and break down to send energy in the form of rays.
Radioactive
Substance containing at least 2 chemically bound atoms
Molecules
Complicated molecule
Compound
intra
between atoms with the same molecule
inter
between atoms with different molecules