Which is NOT true of how Dmitri Mendeleev organized the periodic table?

• He organized it by atomic mass

• He organized it by the number of protons

• He grouped elements with similar properties together in columns

• He left gaps for elements he believed hadn't been discovered yet and predicted their properties

Which of the following is not a metal?

• silicon

• manganese

• sodium

• aluminum

Which of the following elements is a representative element?

• Iron

• Magnesium

• Lanthanum

• Actinium

Who is known as the "Father of Chemistry?"

• Mendeleev

• Moseley

• Newlands

• Lavoisier

The current periodic table we use today is organized by increasing ________________ and grouped by _________________

• atomic mass & valence electrons

• atomic number & properties

• atomic weight & properties

• atomic number & neutrons

Moseley organized the Periodic table by atomic _________, and Mendeleev organized it by atomic ___________

• Mass, Number

• Number, Mass

• Structure, Mass

• Number, Isotope

Each column in the periodic table is called a 

• period
• group
• cluster
• unit

The atomic number tells you what?

• number of electrons
• number of protons
• number of neutrons
• both electrons and protons in an atom.

The period for Bromine is ___________.

• 3
• 2
• 4

The number at the top of each square on the periodic table is the ...

• atomic number
• atomic mass
• Chemical Symbol
• Element Name

Tags

NGSS.MS-PS1-1