The Periodic Table and Periodic Law

Front

The statement that there is a periodic repetition of chemical and physical properties of the elements when they are arranged by increasing atomic number is called the ________.

Back

periodic law

Front

Back

sulfur

Front

Group 17 comprises highly reactive elements that are known as ______.

Back

halogens

Front

A vertical column of elements in the periodic table arranged in order of increasing atomic number is a _____.

Back

group

Front

Elements that are generally shiny when smooth and clean, solid at room temperature and good conductors of heat and electricity are called ____.

Back

metals

Front

The horizontal rows in the periodic table are called _____.

Back

periods

Front

The elements in Group 18 of the periodic table are known as ______ gases.

Back

noble gases

Front

The atomic number of an element is defined as the number of ______ in the nucleus of an atom.

Back

protons

Front

The periodic table is organized by increasing ______ number.

Back

atomic

Front

Elements that have properties of both metals and nonmetals are called ____.

Back

metalloids