Unit 8 Review: Periodic Table

What is the atomic number for the element?

• 196.97

• 118

• 79

• 197

How many electrons does the element contain?

• 79

• 80

• 118

• 3

How many neutrons does the element contain?

• 79

• 117

• 118

• 276

All of these elements are metals except-

• gold

• helium

• sodium

• aluminum

Reading from left to right, elements in the same period on the periodic table-

• have the same reactivity

• decrease in atomic mass

• increase in atomic number

• have the same number of electrons

The periodic table of the elements organizes elements according to their properties. A section of the periodic table is shown to the right. Refer to this periodic table to answer the question.

Two elements in the same group on the periodic table of the elements are most similar in their-

• atomic masses

• number of protons

• atomic size

• chemical properties

The periodic table of the elements organizes elements according to their properties. A section of the periodic table is shown to the right. Refer to this periodic table to answer the question.

Which set of elements below is the most similar in chemical behavior?

• H, Be, Sc

• Fr, Ra, Rf

• Ti, V, Cr

• Be, Ca, Ra

A certain element has 15 protons, 15 electrons, and 16 neutrons. What is its atomic number?

• 16

• 15

• 1

• 31

Which of these elements has an electron structure most similar to that of element X?

• 1

• 2

• 3

• 4

Based on their positions on the periodic table, which element has the most protons?

• B

• O

• Ba

• Os