Periodic Table Test

The Russian scientist, Dmitri Mendeleev, noticed that by arranging the elements known at his time in order of increasing ________, similarities in the chemical properties appeared at regular intervals.

• atomic number

• atomic mass

• group number

• period number

Mendeleev predicted that spaces left in his periodic table represented

• isotopes.

• radioactive elements.

• undiscovered elements.

• noble gases.

Based on evidence collected since Mendeleev’s time, elements on the modern periodic table are arranged in order of ________.

• mass number

• group number

• average atomic mass

• atomic number

What periodic group includes argon, krypton, and xenon?

• noble gases

• halogens

• alkaline earth metals

• actinides

Elements in a group on the periodic table can be expected to have similar

• atomic masses.

• number of neutrons.

• properties.

• atomic numbers.

Each period on the periodic table corresponds to

• an energy level.

• a sublevel.

• atomic mass.

• atomic number.

Calcium, Ca, and arsenic, As, belong to

• Group 17.

• Period 4.

• Group 2.

• Period 3.

Identify the sublevels in a period that contains 18 elements.

• s, f

• s, p

• s, p, d

• s, p, d, f

Elements in which the d-sublevel is being filled have properties of

• metalloids.

• nonmetals.

• metals.

• actinides.

Tags

NGSS.HS-PS1-1

The elements whose electron configurations end with s² p⁵ in their outmost energy level are known as

• noble gases.

• transition metals.

• alkali metals.

• halogens.

Tags

NGSS.HS-PS1-1