ch1 - early experiments Flashcards
1
Q
law of conservation of mass
A
mass is neither created nor destroyed
2
Q
element
A
substance that consists of one type of atom
3
Q
compound
A
substance that consists of more than one element
4
Q
atomic number
A
number of protons in the nucleus
5
Q
mass number
A
sum of protons and neutrons in nucleus
6
Q
isotope
A
different forms of the same element, same atomic number, different mass, so different number of neutrons
7
Q
cation
A
positively charged ion
8
Q
anion
A
negatively charged ion
