Atoms and The Periodic Table

Front

Mendeleev created the first periodic table by arranging the elements in order of:
- decreasing atomic mass
- increasing atomic mass
- increasing atomic number
- increasing melting points and densities

Back

increasing atomic mass

Front

How did chemists change Mendeleev's periodic table in the early 1900s?

Back

They used atomic number instead of atomic mass to organize the elements

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

Most metals are NOT

Back

liquid at room temperature

Tags

NGSS.MS-PS1-4

Front

Where are the most reactive metals found in the periodic table?

Back

In Group 1, the first column to the left

Front

Which group contains the most elements?
Options: metalloids, nonmetals, metals, transition elements

Back

metals

Front

Ductile material

Back

can be pulled out, or drawn, into a long wire

Front

In an atom, the number of protons equals the number of: nuclei, electrons, neutrons, isotopes

Back

electrons

Front

The elements in a Group (or Family) of the periodic table

Back

have similar properties

Front

What information in the periodic table indicates the number of protons in an atom?

Back

the element's atomic number

Front

The two most common alkaline earth metals are: copper and zinc, iron and silver, sodium and potassium, calcium and magnesium.

Back

calcium and magnesium