Quiz 2 Flashcards
1
Q
atoms
A
building blocks of matter
2
Q
element
A
a pure substance made of only one kind of atom
3
Q
trace element
A
an element indispensable for life but required in extremely minute amounts
4
Q
atomic number
A
number of protons
5
Q
mass number
A
the total number of protons and neutrons in the nucleus of an atom
6
Q
atomic notation
A
a symbolic method for expressing the composition for an atomic nucleus
7
Q
isotopes
A
atoms of the same element that have different numbers of neutrons
8
Q
periodic table of elements
A
complete list of elements
9
Q
atomic weight
A
average of the mass numbers of all isotopes
10
Q
alkali metals
A
group 1
11
Q
alkaline earth metals
A
group 2
12
Q
halogens
A
group 17
13
Q
inert/noble gases
A
grouop 18
14
Q
transition metals
A
groups 3-12
15
Q
ground state
A
most stable electron arrangement
