Chapter 18 - Chemical Bonds

Which of the following BEST describes a chemical bond?

• A physical connection holding atoms together.

• A force holding atoms together.

• Two elements combined into a single substance.

Tags

NGSS.HS-PS1-1

When does an atom become an ion?

• When it gains or loses electrons and takes on a charge.

• When it is stable because it has a full set of valence electrons.

• When it forms a compound with another atom.

What is a binary compound?

• A compound made of two elements

• A compound made of two atoms.

• A compound made of two types of ions.

Tags

NGSS.MS-PS1-1

What is a hydrate?

• A compound that is wet.

• A compound with water molecules bonded to it.

• A compound made with hydrogen.

Match the numerical prefix to the number it represents.

• tetra-

• 3

• penta-

• 2

• tri-

• 5

• di-

• 4

• mono-

• 1

If a compound is ​ ionic, it will be between ​ (a)   .

If a compound is ​ covalent, it will be between ​ (b)   .

• two nonmetals
• a metal and a nonmetal
• two metals

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When looking at the name of a compound, you can tell whether it's ionic or covalent because... [Choose 2]

• ...only ionic compounds have prefixes in them.

• ...only covalent compounds have prefixes in them.

• ...only ionic compounds can have Roman numerals like (II) in them.

• ...only covalent compounds can have Roman numerals like (II) in them.

• copper

• oxygen

• this isn't an ionic compound

• nitrogen

• oxygen

• this isn't an ionic compound

Say whether each statement is true of ionic or covalent compounds.

Groups:

(a) Ionic

,

(b) Covalent

• Has metals

• Between a positive and a negative ion

• Uses Greek prefixes in name

• Atoms share electrons

• Only has nonmetals

• Can have roman numerals in name

Tags

NGSS.HS-PS1-3