Periodic Table
What is the atomic number?
The amount of protons in an atom.
What is a proton?
A particle that has a positive charge and is found in the nucleus.
What is atomic theory?
Atomic theory is a scientific concept that explains the nature of matter and its behavior.
What are chemical families?
A group of elements in the same column of the periodic table that have similar properties.
What is a molecule?
A molecule is formed when two or more atoms bond together.
What are periods?
Rows on the periodic table.
What is a neutron?
What are the four atomic models we talked about in class?
Atomism, Solid Sphere Model, Plum Pudding Model and Nuclear Model.
Elements in the same family often what?
React in similar ways
Have similar uses
Share similar characteristics
What is a chemical bond?
Forces that hold the atoms together.
What are groups?
Columns on the periodic table.
What is an electron?
A negative charged particle that moves around the neutron.
Which theory or model is the one that claims that all matter is made up of tiny, indivisible particles called atoms?
Atomism
What are the five major chemical families?
Alkali Metals, Alkaline Metals, Transition Metals, Halogens, and Noble Gases.
What is the formula for water and the one for carbon dioxide?
H₂O and CO2
Who share similar properties?
Elements in the same group.
What are energy levels?
The areas where an electron moves.
Which scientist discovered the electron?
J.J. Thompson
Scientists use what to predict how elements will behave?
Chemical families
Why do atoms join together and form molecules?
To become more stable.
What part of the periodic table contains the most metals?
The left and center of the table.
What are subatomic particles?
The different parts of an atom (protons, neutrons and electrons).
Which theory or model proposed that most of the mass of the atom is found in a nucleus at the center, with electrons orbiting around it?
The Nuclear Model
Which family is very reactive and found in Group 1?
Alkali Metals
Why are molecules important?
Molecules are important because many substances around us, including water, air, and living things, are made of molecules.