Atoms
The building blocks of matter
What are atoms?
Made up of only one kind of atom
What is an element?
Anything that has mass and takes up space
What is matter?
These are found on the far right side of the periodic table
What are non-metals?
This is an positively charged particle in the nucleus of an atom.
What is a proton?
These are shiny, good conductors of heat and are malleable.
What are metals?
True or False - Hydrogen is matter
True
This tells us the number of protons in the nucleus of each atom of an element
What is the atomic number?
The negatively charged particle in the nucleus of an atom
What is an electron?
These are poor conductors of heat and electricity. They are dull and brittle.
What is a non-metal?
True or False - Heat is matter
False
This is the sum of an atom's protons and neutrons
What is mass number?
This is an uncharged particle in the nucleus of the atom
What is a neutron?
Elements that have characteristics of metals and non-metals.
What are metalloids?
True or False - light is matter
False
Beryllium has a mass number of 9. How many neutrons are in its nucleus?
5 neutrons
Two or more atoms joined together
What is a molecule?
Describe the chemical make-up of a water molecule
Water is made up of 2 hydrogen atoms and 1 oxygen atom
An atom of lead has the atomic number 82 and a mass number of 207. How many neutrons does this atom of lead have?
125 neutrons