Introduction to Atoms
The smallest particle an element can be divided into.
What is an atom?
How did Mendeleev organize the elements in his periodic table?
In order of increasing atomic mass.
Elements that are good conductors of electric current and heat
Atoms with the same number of protons and different numbers of neutrons.
What is an isotope?
What are the 3 particles that make up an atom?
Double points if you can give me the charges for each one.
Proton (positive 1), neutron (zero charge), and electron (negative 1)
True or False
The cloud model of the atom describes the location of electrons as specific orbits around the nucleus.
False
What do the elements in the same column in the periodic table have in common?
Elements in a column have similar properties.
The metals of Groups 3-12. Some metals from this group include gold, copper, and iron.
What are the transition metals?
The very small, dense center of an atom
Which two particles are found in an atom's nucleus?
Protons and neutrons
This scientist proposed the model of the atom that described electrons scattered throughout a ball of positive charge.
Who was J.J. Thomson?
The information found in the periodic table for each element includes...
The element's atomic number, chemical symbol, name, and atomic mass
Which groups of metals is the most reactive?
Alkali metals
A term used to describe an element that is shiny and reflective.
Another name for a group
What is a family?
Ernest Rutherford discovered these 2 things after doing his gold foil experiment.
What are the nucleus and protons?
The periodic table is divided into 3 categories. What are the 3 categories?
Metals, nonmetals, and metalloids or semi-metals
Name 3 properties of metals.
Luster, malleable, ductile, thermal conductor, electrical conductor, reactivity, corrosion
A term used to describe a material's ability to be pulled out, or drawn, into long wires.
What is ductile?
Some of the elements found in Groups 13-16 are called?
The metals in mixed groups.
This scientist proposed the model of the atom that described electrons in specific orbits around a positively charged nucleus.
Who was Niels Bohr?
On the periodic table the columns are called________ and the rows are called _________.
groups, periods
What are the names of the metals found in the bottom 2 rows below the main part of the periodic table?
Lanthanides and actinides.
An arrangement of elements showing the repeating pattern of their properties.
What is the periodic table?
The ease and speed with which an element combines with other substances.
What is reactivity?