Unit B Section 3.1

Question 1

table salt’s chemical name

Answer 1

sodium chloride and its formula is NaCl

Question 2

In 1787, a French chemist named Guyton de Morveau created a naming system, or nomenclature, for compounds

Answer 2

always putting the metal element first. For example, zinc and oxygen combine to form zinc oxide

Question 3

Since 1920, the International Union of Pure and Applied Chemistry (IUPAC) has been the body responsible for agreeing on the appropriate name for every chemical compound discovered.

Answer 3

yeas

Question 4

What is a subscript number?

Answer 4

“Sub” means below

No subscript number indicates that only one atom of that element is needed.

Question 5

What is an ionic compound?

Answer 5

Ionic compounds are pure substances formed as a result of the attraction between particles of
opposite charges, called ions

The atoms stay together because they are trading electrons

Question 6

Properties of ionic compounds

Answer 6

• Made by mixing metals with non-metals
• Break apart into ions in solutions (wet mixtures)
• conduct electricity
• solid at room temperature
• distinct crystal shape
• High melting and boiling points

Question 7

What is a molecular compound?

Answer 7

Occurs by mixing two or more non-metal elements together.

• The atoms get mixed up and form new bonds. (inner particles are stuck together in a new way)
• The atoms stick together because they are sharing electrons.

Question 8

Properties of molecular compounds?

Answer 8

• made by mixing different non-metals
• do not break apart into ions in solution
• do not conduct electricity
• solid, liquid, or gas at room temperature
• High melting and boiling points

Question 9

What is a chemical compound?

Answer 9

whenever two or more elements are chemically joined to form new chemicals with new properties.

Question 10

What contains neutral atoms?

Answer 10

molecule

Question 11

What is a diatomic molecule?

Answer 11

a diatomic molecule composed of two atoms of the same kind of atom.

Question 12

What is an ion?

Answer 12

an atom that is no longer neutral. either has a negative or positive charge because it either lost or gained electrons.

Question 13

What does a subscript indicate?

Answer 13

How many elements are in the atom?

Question 14

What do these (s),(l),(g), (aq) indicate?

Answer 14

The state of the compound:

s) = solid
(l) =liquid
(g) = gas
(aq) aqueous solution( when something is dissolved in water