Atomic Structure and Periodic Table

An atom, as shown on the periodic table, is neutral because it contains equal numbers of _____.

Elements on the modern periodic table are arranged according to their _________.

How many electrons are in the element Polonium (Po)?

What is the term used for the electrons in the outermost shell or energy level?

What is the correct ordering of these small parts of matter, from the smallest to the largest?

Which of the following is an example of a homogeneous mixture?

The sum of the number of protons and neutrons inside the nucleus is called the __________.

Valence electrons are located _________.

A single proton has what type of charge?

Which listing below shows the proper charges of the subatomic particles?

Because atoms have the same number of protons and electrons, atoms are ____.

How many neutrons does Rb-85 contain?

The atomic number of an element is the same as the number of ____ an element.

The subatomic particle that moves around the nucleus is.....

Which of the following is an example of a heterogeneous mixture?

If an atom has 16 protons it will also always have _______.

The number of protons an atomc contains is identified by the ____ ____ on the periodic table.

Which subatomic particles have approximately the same size and mass as each other?

_______ is responsible for the atomic theory.

The first letter of a chemical symbol is written as a ______ letter.

Which subatomic particles are located inside the nucelus of an atom?

Neutrons and protons are found in the ..... of the atom.

The chemical symbol for Neon is __?

How many protons are in the element Polonium (Po)?