Unit 3 Lesson 2

Question 1

Periodic table

Answer 1

The arrangement of the elements in order of increasing atomic mass. Elements with similar properties fall in the same column

Metals are on the left, then metalloids then nonmetals

The zigzag line separates metals from nonmetals

Question 2

Chemical symbol

Answer 2

An abbreviation for the element’s name

Question 3

Average atomic mass

Answer 3

The average mass of all the naturally occurring isotopes of that element

Question 4

How are elements arranged on the periodic table?

Answer 4

Metals - on the left side

Nonmetals - on the right side

Metalloids- between metals and nonmetals (zigzag line)

Question 5

Metals

Answer 5

Elements that are shiny and are good conductors
Solid at room temperature
Malleable (can be bent into different shapes
Ductile (can be made into wires)

Question 6

Nonmetals

Answer 6

Elements that are poor conductors
Often dull and brittle

Question 7

Metalloids

Answer 7

Have some properties of metals and nonmetals

Used to make semiconductor chips in computers

Question 8

Group (Family)

Answer 8

Each vertical column of elements on the periodic table

Have similar physical and chemical properties

Question 9

Period

Answer 9

Each horizontal row of elements (from left to right) on the periodic table

Elements in the middle of the period are the most dense
The atomic number increases by 1 as you move from left to right

Question 10

Valence electrons

Answer 10

Found in the outer part of the electron cloud. They participate in chemical bonding
Help determine how reactive an element is.

Elements in the same group have the same # of valence electrons

Answer 11

Group 1- Alkali metal
Group 2- Alkaline earth metal
Transition metal (group 3 to 12)
Group 13- Boron group
Group 14- Carbon group
Group 15- Nitrogen group
Group 16- Oxygen group
Group 17- Halogen
Group 18- Noble gases