I
What does the atomic number tell you?
The number of protons
What is a horizontal row on the periodic table also called?
period
What do elements of the same group share?
Similar properties
Iron is an example of what
a metal
What is found in the nucleus?
protons and neutrons
Which particle has no charge?
neutron
Left side
What do we call the letters that represent an element on the periodic table?
Oxygen is an example of a
nonmetal
What group is a highly reactive nonmetal likely to be found in?
Group 17
an isotope differs because it has a different number of what?
neutrons
Where are nonmetals located on the periodic table?
Right side
When an atom gains or loses electrons
What do atoms of the same element always have the same number of?
protons
An element's symbol with two letters always has what?
A capital then lowercase letter
What does the atomic mass equal?
protons + neutrons
Where are metalloids found on the periodic table?
along the stair-step line
The periodic table is arranged by increasing what?
atomic number
what is the weighted average of isotopes?`
atomic mass
What does the stair-step line help identify?
metalloids
What is a vertical column on the periodic table also called?
group
What does the identity of an element depend on?
Number of protons
Silicon is an example of what
a metalloid
Where do elements with similar properties appear?
in the same group
What are the number of protons and electrons in a neutral atom in relation to one another?
They are equal.