Unit 3 Review

What element is represented in this Bohr Model? 

• Carbon
• Hydrogen
• Aluminum
• Lithium

How are the elements in the periodic table arranged?

• by their atomic mass
• by their chemical symbol
• by their chemical name
• by their atomic number

The yellow atoms are called 

• metals
• nonmetals
• metalloids
• noble gases

The elements in this group have 5 valence electrons and include elements N, P, and As.

• Group 5
• Group 1
• Group 18
• Group 15

Elements in Group 2 have

• Two energy levels
• Two valence electrons
• Two compounds
• Two electrons

Which group of the periodic table is composed of inert (not reactive)  gases?

• alkali metals
• alkaline earth metals
• halogens
• noble gases

Elements which are shiny, conduct electricity and heat are called

• metal
• nonmetal
• metalloid
• nonexistent

Tags

NGSS.HS-PS1-1

Metalloids can be described as...

• same as nonmetals
• bad conductors
• characteristics of metals and nonmetals
• same as metals

True or False: Elements in a group have the same number of electrons in their outer shell.

• true
• false

The properties of an element can be predicted from...

• color
• location on Periodic Table
• educated guess
• atomic number