elements and the periodic table 2

Front

What type of element makes up most (75%) of the periodic table?

Back

Metals

Front

How many neutrons does Platinum (Pt) have? (round to the nearest whole number)

Back

117

Front

Which subatomic particle has no charge?

Back

Neutron

Front

Which subatomic particle has a positive charge?

Back

Proton

Front

The number of protons and number of electrons is an element's _________________.

Back

Atomic Number

Front

What is the term for the vertical columns in the periodic table?

Back

Groups or Families

Front

What is the term for the horizontal rows in the periodic table?

Back

Periods

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the significance of the atomic mass of an element?

Back

It represents the average mass of an element's isotopes.

Front

What are metalloids?

Back

Elements that have properties of both metals and nonmetals.