9th Atoms and The Periodic Table

The nucleus of an atom has a ____ charge.

Oxygen, bromine, and chlorine are examples of ____.

An atom's atomic number is 8. It's mass number is 18. How many neutrons does it have?

Elements having 3 or fewer electrons in the outer energy level are classified as ____.

The chemical symbol for carbon is "C".

Dot diagrams are used to represent ____.

In a neutral atom of an element, the number of protons, neutrons, and electrons are the same.

Electrons located ____ have the most energy.

You will need to know why the periodic table to important to students and scientists.

____ are elements in Groups 3-12.

Scientists use ____ to represent objects that are too large or too small to study.

Atoms fill energy levels from the outermost to the innermost.

Be able to explain how to calculate average atomic mass.

Protons and electrons have similar masses.

Horizontal rows on the periodic table are called ____.

A chemical symbol represents the ____ of an element.

All Group 18 elements have ____ valence electrons and are considered stable.

Quarks can be produced by bombarding protons with other protons.

A(n) ____ is matter composed of one type of atom.

A(n) ____ is an atom with a different number of neutrons than protons.

Vertical columns of elements are called ____.

The first scientist to organize the elements into a table was ____.

The machine used to accelerate protons in the study of subatomic particles is ____.

Electrons have a positive charge.

Mosely arranged the elements in order by ____.

Isotopes of an element differ by the number of ____.

The 6th quark is also know as the ____ quark.

Protons and neutrons are made of ____.

In the modern atomic model, electrons are most likely to be found ____.

Hydrogen-1 has an atomic mass of one. How many neutrons does it have?

____ is weighted based upon abundance.

To find an atom's mass number, ____ the number of protons and neutrons.