DRAW THESE ATOMS, SHOWING EACH PARTICLE AS A DOT
Draw a neutral Hydrogen atom with a mass of 1 unit.

Draw a neutral Hydrogen atom with a mass of 2 units.

Draw a neutral Hydrogen atom with a mass of 3 units.

Draw a +1 Hyrdogen ion with a mass of one unit.

Draw a neutral Helium atom with a mass of 4 units.

Draw a neutral Helium atom with a mass of 5 units.

Draw a +1 Helium ion with a mass of 4 units.

Draw a +1 Sodium ion with a mass of 24 units.

DRAW THESE ATOMS THE EASY WAY, LISTING THE #'s OF THE PARTICLES
Draw a neutral Chlorine atom with a mass of 35 units.

Draw a neutral Chlorine atom with a mass of 36 units.

Draw a -1 Chlorine ion with a mass of 35 units.

Draw a neutral Magnesium atom with a mass of 24 units.

Draw a +2 Magnesium ion with a mass of 24 units.

Draw a gold atom as you think it should be drawn from the periodic table.

Draw a +1 gold ion with a mass of 195 units.

Draw a neutral Sulfur atom with a mass of 32 units.

Draw a +6 Sulfur ion with a mass of 32 units.

ANSWER THESE QUESTIONS ON YOUR SHEET
What is the mass from the periodoc table for the element Lithium?
Almost all of the Lithium atoms that exist are one of two forms (a.k.a. isotopes).  One has a mass of 6 and the other a mass of 7.  Which one is more common and how do you know?