Using the Periodic Table

The periodic table is:

• a chart of the elements arranged according to their atomic number

• a list of chemical reactions

• a table of physical constants

• a chart of historical events

The periodic table is a chart of the elements arranged into rows and columns according to their _______ and _______ properties.

Who created the first periodic table to help classify the elements by their properties?

• Dmitri Mendeleev

• Albert Einstein

• Isaac Newton

• Marie Curie

In the mid-1800s, Russian chemist and teacher _______ created a table to help classify the elements by their properties.

• Dmitri Mendeleev

• Albert Einstein

• Isaac Newton

• Marie Curie

What did Mendeleev notice about the elements in the table?

• They were arranged by atomic mass.

• They were arranged by atomic number.

• They were arranged by density.

• They were arranged by reactivity.

The elements in the table showed repeating patterns; _______ is a word used to describe such patterns.

• periodic

• random

• chaotic

• sporadic

What is the atomic number?

• The number of protons in an atom

• The number of neutrons in an atom

• The number of electrons in an atom

• The number of molecules in a compound

Tags

NGSS.MS-PS1-1

The atomic number is the number of _______ in the nucleus of an atom of an element.

• protons

• neutrons

• electrons

• atoms

You can identify the properties of an element by studying its _______ on the periodic table.

• placement

• color

• weight

• density

The element key shows the element’s name, atomic number, chemical symbol, state of matter, and atomic _______.

• mass

• weight

• volume

• density

Tags

NGSS.MS-PS1-5