Periodic Table of Elements Unit

Periodic Table

100

What are the elements called that create a zigzag pattern on the periodic table?

Metalloids

200

The majority of the elements on the periodic table are classified as what?

metals

300

On the right side of the periodic table, most of the elements are classified as what?

non-metals

400

Elements share similar chemical properties that are in the same ______.

group or column or family (up and down)

500

Why are there two rows separated from the rest of the periodic table, placed below the rest?

it would be too long to fit on a standard piece of paper

Miscellaneous

100

What do some scientists say that we are all made up of?

*star dust*

200

What are the common elements that are found in water?

H₂0

hydrogen, oxygen

300

What is the purpose of the periodic table?

to organize the elements from simplest to most complete (left to right) and with similar chemical properties (up and down)

400

What does a table, an apple, and a cell phone all have in common?

they are all made of atoms - EVERYTHING is made of up ATOMS!!

500

What are the common elements that are found in baking soda?

NaHCO₃

sodium, hydrogen, carbon, oxygen

Classification

100

What is the following classified as?

NaHCO₃

compound

200

What is the following classified as?

Co

atom

300

What is the following classified as?

He₂

molecule

400

What is the following classified as?

NH₃

compound

500

What is the following classified as?

H₂O + C₆H₈O₆

mixture

Matter

100

These elements are typically shiny, malleable and ductile, and are good conductors of heat and electricity.

metals

200

What is the simplest form of matter known as?

atoms

300

These elements can be shiny or dull, and can conduct heat and electricity.

metalloids

400

What are unbonded substances that CAN be broken down into simpler substances known as?

mixtures

500

These elements are often dull and brittle, and cannot conduct heat and electricity.

non-metals

Conservation

100

The law of conservation of mass states that matter cannot be _______ and cannot be _______.

created or destroyed

200

Give two examples of a physical change.

melting, boiling, dissolving, changing shape, cutting something

300

Give two examples of a chemical change.

rusting, burning, digesting

400

What are signs that a chemical change has occurred?

odor, change in color, light and sound, heat, solid formed, gas formed

500

At the end of an experiment, it appeared to the scientist that 15 grams of mass was lost. What is a reasonable explanation of where the 15 grams could have gone?

A gas was formed and was no longer accounted for