Numerous Numbers
Which group number contains the noble gases?
18
What does the zigzag line on the periodic table divide?
Metals and nonmetals
Most metals are good conductors of what?
heat and electricity
An atom with the same number of protons but a different number of neutrons is called a what?
Isotope
How many valence electrons does chlorine have?
7
How many periods are on the periodic table?
7
On which side of the periodic table are nonmetals found on?
Which elements on the periodic table are the most reactive?
Alkali metals
Elements in the same group (column) or family have the same number of what?
valence electrons
a. # of isotopes
b. location on the PT
c. # of neutrons
D. atomic #
B. location on the periodic table
How many groups are on the periodic table?
What do we call the elements located on the stairstep?
Metalloids
The name of this nonmetal group contains chlorine and iodine.
Halogens
Elements in the same period (row) have the same number of what?
electron shells/levels
Mendeleev arranged the elements by:
density, melting point, appearance, or atomic mass?
Atomic mass
The second shell in an atomic drawing can hold a maximum of how many electrons?
8
What is a horizontal row on the periodic table called?
period
These metals have 2 electrons in their outer most level.
Alkaline earth metals
If you found a Carbon 13 atom, you would know that:
a. it has 13 protons
b. it has 13 neutrons
c. it has 13 electrons
d. it has 7 neutrons
d. it has 7 neutrons (same number of protons, different number of neutrons)
Which of the following is NOT found on the PT?
atomic number, symbol, density, atomic mass
density
How many neutrons does Magnesium have?
12
What is a vertical row (column) on the periodic table called?
group
I come in several natural forms, including diamond and graphite (think of the lead of a pencil) and am a nonmetal.
Carbon
How many electrons does Phosphorus have?
15
An atom of silver with 47 protons, 47 electrons, and 61 neutrons would have a mass number of what?
108