Periodic Table Basics

The radius of an atom can only be found by?

• Asking the atom nicely
• Measuring the distance between the nuclei of two touching atoms and halving the distance.

• Measuring the weight of the atom
• Guessing based on the atom's color

The effective nuclear charge is _____ the actual nuclear charge

• equal to

• less than

• greater than

How do core electrons differ from valence electrons? Choose all that apply (2)

• Core electrons are found on the lower energy levels, while valence electrons are in the outermost energy level

• Valence electrons shield, core electrons do not

• Core electrons shield, valence electrons do not

Which family/group is very reactive and donates/gives away electrons to become a cation?

• Alkali Metals

• Halogens

• Noble Gases

• Non-Metals

Which family/group is very reactive and accepts/steals electrons to become a anion?

• Alkaline Earth Metals

• Halogens

• Noble Gases

• Transition Metals

When atom loses an electron, the size will

• be greater

• increase

• have no change

• be smaller

Identify the element that is non-reactive (inert) with 4 energy levels.

• Krypton
• Argon
• Potassium
• Calcium

What is an anion's charge?

• positive

• negative

• neutral

• depends on the element's charge

Which element has the same number of valence electrons as this element?

• Bromine (Br)
• Nitrogen (N)
• Calcium (Ca)
• Boron (B)

How many energy levels does an atom of Chlorine have?

• 2
• 3
• 4
• 7