Atomic structure/ periodic table

The atomic number is always equal to the number of:

Number of protons in iron, Fe

An isotope has the same number of protons but a different number of:  

Atomic number 95, Am is classified as:

Charge of a proton

Touching the stair-step line on the periodic table

The alkali metal in period 4

How many neutrons does potassium have?

The charge of only the nucleus of the atom

How many neutrons does a neutral atom of sulfur have?  

The atomic number of chlorine:

Location of protons and neutrons

These two subatomic particles have the same mass:

Smallest particle that retain the properties of an element

Which of the following is in the same period as C?

Charge of a neutron

Group 7A on the periodic table

If an element has an atomic number of 4, how many protons does this element have?

Greatest mass

How do you calculate the number of neutrons?

Charge of an electron

In the isotope:  Po-210,  the 210 represents:

The transition metal:

Greatest mass, least volume

Vertical column on the periodic table