8F Periodic Table Revision

In the modern periodic table elements are arranged by:

• atomic mass
• atomic number
• valence electrons
• number of isotopes

Why were there blank spaces left in Mendeleev's periodic table?                                              

• He didn't know what to put there.
•  Undiscovered elements not yet known.
• Multiple elements could have fit
• He forgot to add the elements in.

_______________ developed the first periodic table and arranged the elements in order of increasing atomic mass.

• Stevie Wonder
• Sasha Vujacic
• Dmitri Mendeleev
• James Mosely

Which property did Mendeleev use to order his periodic table?

• Shielding effect
• Eletronegitivity
• Atomic Weight
• Metallic Character

The horizontal row on the periodic table is called a

• group
• family
• period
• atomic number

Tags

NGSS.HS-PS1-1

What is the chemical symbol for Lithium?

• H
• He
• Li
• N

Tags

NGSS.HS-PS1-1

Most of the elements on the periodic table are classified as _____.

• Metals
• Nonmetals
• Metalloids
• Periods

Tags

NGSS.HS-PS1-1

This class of elements are sometimes called "semiconductors."

• Metals
• Nonmetals
• Metalloids
• Groups

Tags

NGSS.HS-PS1-1

Each column in the periodic table is called a 

• period
• group
• cluster
• unit

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

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