What is the periodic table?

• A chart of elements

• A list of chemical reactions

• A table of compounds

• A guide to laboratory equipment

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

• chemical

• alphabetical

• numerical

• random

Who created a table to help classify the elements by their properties in the mid-1800s?

• Dmitri Mendeleev

• Albert Einstein

• Isaac Newton

• Marie Curie

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

• periodic

• random

• chaotic

• sporadic

What did Mendeleev notice about the melting point of elements?

• Mendeleev noticed that the melting points of elements increased with atomic weight.

• Mendeleev noticed that the melting points of elements decreased with atomic weight.

• Mendeleev noticed no pattern in the melting points of elements.

• Mendeleev noticed that the melting points of elements were random.

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.

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

• mass

• weight

• volume

• density

A(n) _______ is a column on the periodic table.

Most of the elements in the periodic table are _______, which are shiny and conduct thermal energy and electricity.

• metals

• nonmetals

• metalloids

• noble gases