periodic test Flashcards
1
Q
how is the periodic table organized
A
in order of increasing atomic number
2
Q
rows are known as
A
periods
3
Q
columns are known as
A
groups
4
Q
3 main catagories of matter in the periodic table
A
metals, metalloids, and nonmetals
5
Q
What is the name of the group of elements that includes Lithium, Sodium, and
Potassium?
A
alkali metals
6
Q
Why are the noble gases called “inert”?
A
they are always found in their pure state
7
Q
periods represent the number of:
A
energy levels
8
Q
most elements are found as _____ at room tempreture
A
solids
9
Q
the repeating pattern of chemical and physical properties of
elements
A
periodicity
10
Q
f cl and br are known as
A
halogens (make salt)
11
Q
___ elements are gas
A
11
12
Q
___ elements r liquid
A
2 (br Hg)
13
Q
key part of dna
A
phosphorus
