Ch 18 Physical Science Test

The Statue of Liberty is green because:

• it is painted green.

• it is made of copper which has oxidized.

• it is covered in algae.

• it is illuminated with green lights.

What is a compound?

• A substance formed when two or more chemical elements are chemically bonded together.

• A single element in its pure form.

• A mixture of different substances that are not chemically bonded.

• A type of chemical reaction.

The properties of the compound will be the same from the elements that make it up.

• True

• False

Tags

NGSS.MS-PS1-1

What is a chemical formula?

• A representation of a substance using symbols for its constituent elements

• A type of chemical reaction

• A method for balancing chemical equations

• A process for separating mixtures

Tags

NGSS.MS-PS1-1

What is H₂O?

Chemical bonds form from the arrangement of ?

• Electrons

• Protons

• Atoms

• Neutrons

Tags

NGSS.MS-PS1-1

What is the Electron Dot diagram?

• A representation of the valence electrons in an atom using dots

• A diagram showing the atomic structure

• A chart of electron configurations

• A graph of electron energy levels

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Why do Period 18 or Noble gases not form compounds?

• Because they have a complete octet of electrons

• Because they are highly reactive

• Because they have an incomplete octet of electrons

• Because they are metals

Some elements will ​ (a)   electrons to become full, some will ​​ (b)   electrons to become full. ​

• lose
• gain
• keep
• make

What compound will Na vs Cl make?

• Ionic

• Covalent

• Polar

• Nonpolar

Tags

NGSS.HS-PS1-2