organization of matter Flashcards
1
Q
what is an atom?
A
smallest unit of matter that still retains the properties of an element
2
Q
atoms are made over 100 subatomic particles, but only how many are important for biological compounds?
A
only 3
3
Q
proton (p +)
A
has a single positive electrical charge, carries a single positive charge
4
Q
electron (e -)
A
has a single negative electrical charge, carries a single negative charge
5
Q
neutron (n 0)
A
electrically neutral, carries no electrical charge
6
Q
what is a nucleus? what is it composed of? what moves around the nucleus?
A
nucleus: the central part of atom
it is composed of protons and neutrons
electrons move around the nucleus arranged in electron shells
