Periodic Table
True or False: Atomic numbers on the periodic table increase as you move left to right and top to bottom.
True
Everything on Earth - from the water you drink to the chair you are sitting on - is made from substances called ______.
How many protons and electrons does a Lithium atom have?
3 Protons and 3 electrons
What do scientists use to organize the elements?
Periodic Table
What 2 elements combine to make water?
Hydrogen and Oxygen
What is the name of the scientist that created the modern version of the periodic table that we use today?
Dmitri Mendeleev
True or False: Some elements have been known since ancient times.
True
Which atom has 20 protons and 20 electrons?
Calcium
What color M&Ms did we use for Electrons in the atom models?
Green
Write whether each of the follow ARE or ARE NOT matter.
a Clock, Air, Thoughts
Clock - yes
Air - yes
Thoughts - no
Why did Mendeleev leave gaps in his periodic table model?
For the undiscovered elements he predicted.
Match the symbols to the correct elements:
Ne, Na, Al, Ti
Neon, Sodium, Aluminum, Titanium
Which atom is this?
Sodium
How many total elements are on the periodic table?
118
Matter is anything that has ____ and takes up ____.
Mass and Space
How many periods and groups/families are there on the periodic table?
7 periods (rows). 18 groups (columns)
Name 1 use of Neon and 1 use of Chlorine.
Neon = Advertising. Chlorine = Treating water, cleaning swimming pools.
Which atom is this?
Fluorine
When building the atoms models out of M&Ms, how did we find the number of neutrons in the nucleus?
Atomic mass minus Atomic numbers.
What is a common use for the element Argon?
Lightbulbs.
Helium, Neon, Argon, Krypton, Xenon, Radon
Name 1 example of metals.
Iron, Copper, Aluminum, Gold
How many Neutrons does a typical atom of Mercury have? (Atomic Mass - Atomic Number = number of Neutrons)
120 Neutrons
What were we trying to demonstrate in the aluminum foil cutting activity? *HINT* What would happen if we kept cutting?
The smallest unit of an element that still has all the properties of that element. If you cut the aluminum small enough, you would get a single aluminum atom that would still be aluminum and have the same properties.
The nucleus of an atom contains what 2 particles?
Protons and Neutrons