ELEMENTS
ATOMS
MOLECULES
MIXED
100
What is an element?
a substance that is made of only one kind of atom.
100
What is an atom?
The smallest particle of a substance.
100
What is a molecule?
When two or more atoms join to form a new particle.
100
What is a compound?
A substance that is made up of more than one element.
200
Name a chemical formula.
H2O, CH4, O2, .......
200
What parts of an atom are found in the nucleus?
Protons and nuetrons
200
How many atoms is found in the compound NaCl?
One sodium atom and One Chlorine atom
200
Where is the known elements organized in?
*Worth Doule*
Periodic table of elements
300
Name number 13.
Chemical Symbol
300
True or False.
There are 118 known elements that can combine to form everything in the physical world.
True
300
True or False
A compound always has the same properties as the atoms that it's made of.
False
300
what is the chemical formula for this molecule?
CO2
400
How many protons does gold (Au) have?
*Worth Double*
79
400
What has a positive charge?
Protons
400
which one is the sugar molecule?
The Right one
400
Where is the atomic number located in a periodic table cell?
on the top left
500
Which element is not a metal?
A. Titanium
B. Magnesium
C. Calcium
D. Selenium
D
500
What is the center of an atom called?
*Worth Double*
Nucleus
500
what is the water chemical formula?
H2O
500
how many parts make up an atom?
3