The Periodic Table

Columns of the periodic table are called:

• group

• period

• atomic radius

Which of the following is true about the elements in Group 1 of the periodic table?

• They are nonmetals

• They have low reactivity

• They are called halogens

• They are known as alkali metals

The elements in Group 17 of the periodic table are known as: a) Noble gases b) Alkali metals c) Alkaline earth metals d) Halogens

• Noble gases

• Alkali Metals

• Alkaline earth metals

• Halogens

The atomic number of an element tells us the number of:

• Neutrons in the nucleus

• Electrons in the outermost energy level

• Protons in the nucleus

• Isotopes in the element

Which of these elements will have the most similar properties to the element Lithium (Li)?

• Sodium (Na)

• Magnesium (Mg)

• Beryllium (Be)

• Calcium (Ca)

What is the number of protons that the element in this image contain?

• 14

• 7

• 15

• 18

Rows of the periodic table are called:

• group

• period

• atomic radius

Elements in the same ____________ have similar properties

• Group

• Period

• Row

• Series

Draw a bohr model of Aluminum (atomic # = 13, on our P-T, it's in the 3rd group)

Answer explanation

What's the name we give to the electrons in the outer shell? (the electrons colored red in this bohr model)