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100
This scientist is credited with creating the first periodic table

Dmitri Mendeleev

100
What does periodic mean?

It means something repeats itself in a predictable pattern

100

How many elements are on our current periodic table?

118

100

What is the lightest element on the periodic table?

Hydrogen

100

What is the name of the chart with all the elements, boxes, and letters on it?

The Periodic Table (of Elements)

200

On our current periodic table, elements with similar properties are arranged in:

columns

200

Mr. Mendeleev's periodic table was arranged according to:

increasing atomic mass
200

The Noble Gases are located where on our current periodic table

Last Column on the Right (Group 18)

200

How does our current periodic table arrange the elements?

by increasing atomic number

200

On Mendeleev's periodic table, elements with similar properties were arranged in:

rows

300

How many rows are on our current periodic table?

seven

300

If you wanted the most explosive reaction with water, which metal should you drop in it:

lithium, sodium, potassium, rubidium, cesium?

cesium

300

Mendeleev was famous for using his periodic table and...

predicting the existence and properties of undiscovered elements (and he was right!)

300

What is unique about the elements nowadays that get added to our periodic table?

They are manmade (synthesized) in labs

<they are also radioactive>

300

How many columns are on our current periodic table?

18

400

When Mendeleev arranged the elements in his periodic table, what did he notice about the arrangement of the elements?

The properties of the elements seemed to be repeating periodically

400

Well aren't you lucky - here's 400 free points!

:)

400

Do the patterns of the properties of the elements on the periodic table fit better when arranging by atomic mass or by atomic number?

atomic number

400

How many protons does the element oxygen have?

Oxygen has 8 protons

400

Why didn't Mendeleev arrange his periodic table by atomic number instead of atomic mass?

Protons had not been discovered at the time Mendeleev made his periodic table

500

Are there places on our periodic table where the element with a certain atomic number has a lower mass than the element before it.

Yes

Ar: Atomic #18, Atomic Mass 39.95

K: Atomic #19, Atomic Mass 39.10

500

What chemical makes up snow?

water - H2O

500

When elements are arranged by increasing atomic number, the properties of those elements repeat themselves every so often - this is called:

Periodic Law

500

What makes every element different from each other in the universe?

Each element has a unique number of protons

500

What chemical did you use, in the very first lab we did, that is being used on the roads today?

Calcium Chloride (CaCl2)

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