The "" tells you the number of protons that are in the nucleus in an atom.

What is the atomic number of this nucleus?

In a neutral atom (an atom with neither a positive or negative charge) there must be an equal number of

What is the atomic number of gold below?

How many protons does this element have in its nucleus?

The atomic number of titanium is

How many protons does Cobalt have based on the element symbol below?

What is the atomic number of this nucleus and what is this element?

In order to change the identity of one atom into another we need to add protons. Selena wants to turn Carbon, which has 6 protons into Vanadium. How many protons does Selena need to add to Carbon's nucleus to make Vanadium?

Why is this, br, the wrong symbol for the element bromine?

Why is this, i, the wrong symbol for the element iodine?

Which of the following elements has 24 protons in its nucleus?

A) Where on the periodic table do the light elements appear?he heavier ones?

B) Where on the periodic table are the periods found?

C) What do the elements found in the same period have in common?

D) Where on the periodic table are the groups found?

E) What do elements found in the same group have in common?

F) What are valence electrons?

G) How do you determine the number of valence electrons?

H) The text says "the periodic table is read like a book". Why is a book a good comparison to the periodic table?

A) Neon (Ne) is in group and therefor has 8 .

B) Sodium (Na) is in period and therefore has 3