CK12 Assessment 4/12 - 5/3

Covalent bonds are between...

• Metal and Non-metal

• Non-metal and Non-metal

• Metal and Metal

• Metal and Metalloid

Ionic bonds are between...

• Metal and Non-metal

• Non-metal and Non-metal

• Metal and Metal

• Metalloid and Metalloid

How are covalent bonds formed?

• Sharing of valence electrons

• Transfer of valence electrons

• Both sharing and transfer of valence electrons

• Sharing of innermost electrons (closest to the nucleus)

Tags

NGSS.HS-PS1-1

How are ionic bonds formed?

• Transfer of electrons between a metal and a nonmetal

• Sharing of electrons between a metal and a nonmetal

• Transfer of electrons between two metals

• Sharing of electrons between a metal and a nonmetal

What is a valence electron?

• The sum of neutrons and protons.

• The electrons in the outermost shell (farthest from the nucleus).

• A type of bond.

• A popular compound.

Two or more atoms held together by a chemical bond is called what?

• A molecule
• A molecure

Tags

NGSS.MS-PS1-1

Fact: All compounds are molecules, but all molecules are not compounds. Why is this so?

• Compounds are made of only one element bonded to itself. Molecules must have at least 2 different elements

• Molecules are made of only one element bonded to itself. Compounds must have at least 2 different elements

• Compounds are always ionic bonds. Molecules are always made of covalent bonds.

• Molecules are always ionic bonds. Compounds are always made of covalent bonds.

Tags

NGSS.MS-PS1-1

A chemical change is different than a physical change because in a chemical change

• chemicals are used

• molecules do not physically touch

• a new substance is formed and in a physical no new substance is formed

• the change can be seen but in a physical change it cannot

Tags

NGSS.MS-PS1-2

Which 2 of the following examples are chemical reactions?

• sugar dissolving in water

• water turning into steam

• burning wood

• mixing baking soda and vinegar

• tearing paper

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Why are chemical equations always balanced? Select ALL that apply.

• Matter cannot be created.

• Matter cannot be destroyed.

• Matter can only be rearranged/conserved.

• Matter doesn't matter.

Tags

NGSS.MS-PS1-5