Stability and Bonding

What is a compound?

• Two or more elements chemically combined

• A single element found in nature

• A stable outer energy level of valence electrons

• A force that holds atoms together

Tags

NGSS.MS-PS1-1

What is a chemical formula used for?

• To form ionic bonds

• To determine the stability of an element

• To tell what elements and how many of each element are in a unit of a compound

• To show the properties of a compound

Tags

NGSS.MS-PS1-1

Why do elements form compounds?

• To be stable

• To create chemical formulas

• To gain or lose electrons

• To have a full outer energy level

Organize these options into the right categories

Groups:

(a) Elements

,

(b) Compounds

• H2O

• NaCl

• O

• Na

• NH3

• K

• Cl

Tags

NGSS.MS-PS1-1

What is the octet rule?

• Atoms will gain or lose electrons to form ions

• Atoms will gain, lose, or share electrons in order to have 8 electrons in their outer energy shell

• Atoms will have a full outer energy level of valence electrons

• Atoms will share electrons to form covalent bonds

Which elements are nonreactive?

• Noble gases

• Transition metals

• Group 1 elements

• Group 17 elements

What type of bond is formed when atoms transfer electrons?

• Ionic bond

• Covalent bond

• Metallic bond

• Polar bond

What type of bond is a force that holds atoms together in a substance

• Ionic bond

• Chemical Bonds

• Metallic bond

• Polar bond

Tags

NGSS.HS-PS1-3

What is the charge of a cation?

• Positive

• Negative

• Variable

• Neutral

What is the charge of an anion?

• Positive

• Variable

• Negative

• Neutral