Atomic Structure and Periodic Table

Front

What are nonmetals?

Back

Nonmetals are elements that typically lack the characteristics of metals. They are usually poor conductors of heat and electricity and can be found in various states (solid, liquid, gas) at room temperature.

Front

What is an ion?

Back

An ion is an atom or a bonded group of atoms that has a positive or negative charge due to the loss or gain of one or more electrons.

Front

What must be true for an atom to be neutral?

Back

For an atom to be neutral, it must have the same number of protons and electrons.

Front

What are the three broad classes of elements?

Back

The three broad classes of elements are metals, nonmetals, and metalloids.

Front

What is a group in the periodic table?

Back

A group in the periodic table is a column of elements that have similar chemical properties.

Front

What is a metal?

Back

Metals are elements that are typically shiny, good conductors of heat and electricity, and are malleable and ductile.

Front

What are metalloids?

Back

Metalloids are elements that have properties intermediate between metals and nonmetals. They can conduct electricity better than nonmetals but not as well as metals.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the mass number?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements organized by increasing atomic number, which shows periodic trends in properties.