Atomic Structure
The smallest piece of matter is known as
What is:
An atom
All of a single kind of atom is called
What is:
An element
The Periodic Table is arranged by increasing amounts of what subatomic particle?
What are:
protons
Which group of elements makes up most of the Periodic Table?
What are metals?
The definition of a compound is
What is:
two or more elements chemically combined.
This subatomic particle has a positive charge
What is:
a proton
The subatomic particle that gives the element its name is the
What is a proton
The atomic number refers to the number of which subatomic particle?
What are:
protons
This group includes the Noble Gases and are located on the right side of the Periodic Table.
What are the non-metals
How many elements are in the compound CO2?
What is:
2
These two subatomic particles are equal if there is no overall electrical charge on the atom.
What are:
protons and electrons
This neutral subatomic particle is critical only because it adds mass to the atom.
What is:
A neutron
The periodic table is divided into Periods and Groups.
What does a Group have in common?
What are:
properties
This group has properties of both metals and non-metals
Metalloids
How many atoms are in the compound CO2?
What is:
3
The nucleus, or core of an atom is made up of what subatomic particles?
What are:
protons and neutrons
In an ion, these two subatomic particles are not equal in number.
What are:
protons and electrons
The Periodic Table is organized into Groups and Periods. Which direction do you read a Period on the Periodic Table?
What is:
across
This characteristic of a metal allows the element to be pulled into a thin wire
What is:
ductile
How many Phosphorous atoms are in Ba3(PO4)2?
What is:
2
How are the number of neutrons determined if given the atomic number and atomic mass of an element?
What is:
Subtract the atomic number (number of protons) from the atomic mass.
What is the term used to describe an atom that has an atomic mass more or less than double its atomic number?
What is:
An isotope.
The Periodic Table is divided into Groups and Periods. Which Group is inert?
What is:
The Noble Gases
Group 18
Group 8
An element that is brittle, can conduct electricity and heat, and has a shiny metallic luster is categorized as
What is:
a metalloid
How many Oxygen atoms are in Fe2(SO4)3?
What is:
12