6th Grade Science - Chapter 7 - Atoms and Periodic Table

Man who developed a classification system for elements

The sum of the number of protons and neutrons results in an atom's approximate atomic ________.

The smallest recognizable piece of an element is a _______________.

Classification system for elements

Man who developed a simplified model of the atom.

The horizontal rows are called__________.

What Scientist think atoms are like, based on repeated observations.

A column on the periodic table of the elements is called a _______.

The study of matter

Special Machine that smashes atoms.

If a Atom has 8 protons, how many electrons does it have?

The space that represents the average distance that electrons are from the nucleus is called __

What is an advantage for scientists to use chemical symbols?

Protons and Neutrons are found in the _____________.

Substances that have only one kind of atom are called what?

Abbreviation for the name of an element.