Periodic Table of Elements

Dmitri Mendeleev organized the chemical elements:

• by number of electrons

• by increasing relative atomic mass

• in alphabetical order

The vertical column in the periodic table is called a:

• Period

• Group

The horizontal row in the periodic table is called a:

• Period

• Group

How many valence electrons does Beryllium have?

• One

• Two

• Three

• Four

Majority of the elements in the periodic table are:

• Metalloids

• Metals

• Nonmetals

On the periodic table, electronegativity generally increases

• from left to right across a period

• from right to left across a period

Element with atomic number of 49

• Chromium

• Palladium

• Bromine

• Indium