Properties of Atoms and the Periodic Table

Front

A particle that moves around the nucleus is a(n) _____

Back

electron

Front

In which state of matter are most of the elements to the left of the stair-step line in the periodic table?

Back

solid

Front

Dot diagrams are used to represent _____

Back

outer electrons

Front

The atomic number of Re is 75. The atomic mass of one of its isotopes is 186. How many neutrons are in an atom of this isotope?

Back

111

Front

Horizontal rows of the periodic table are called _____

Back

periods

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom.

Front

What are isotopes?

Back

Atoms of the same element that have different numbers of neutrons.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number and properties.

Front

What are groups in the periodic table?

Back

Vertical columns that group elements with similar chemical properties.

Front

What is a neutron?

Back

A subatomic particle found in the nucleus of an atom, with no charge.