1-18-12 how many protons, neutrons, and electrons could it have?

Lanthanum,20 protons 24 neutrons 20 electrons

1-17-12 How many neutrons does it have and what is the name of the element?

The element has 16 neutrons and the element name is phosphorus.

1/11/12 The 3 subatomic particles are protoms, neutrons, and electrons. List, in ascending order, the subatomic particles sizes and their changes.

The ascending order is electrons with a no charge, neutrons with a negative charge, and last protons with a positive charge.

1-10-12 What does the period (row) on the periodic table tell you about elements in that row?

The period (row) on the periodic table tell you about elements in the row and the atomic number. That is why there are numbers at the top of every row. But in some cases the elements in that row may not tell you the right atomic number.

1/9/12 What is matter?

matter includes atoms and other particles which have mass,matter is anything that has mass and occupies volume. matter exist in four states, solid, liquid, gas and plasma.

1-6-12 Compare and contrast molecules and compounds.

A molecule is two of the same things chemically combined.It's like taking two pieces of gum and putting them together, the can be the same color or different.
A compound is two different pieces of gum chemically joined together, like a green piece of gum and a red piece of gum.
A compound is two or more atoms.
A molecule is two of the same atoms.

1-5-12 five parts of an atom

Nucleus
Neutron
Proton
Electron
Electron Cloud