Unit 3 Periodocity Review

Mendeleev organized the chemical elements based on their

• symbols

• properties

• atomic numbers

• charges

A horizontal row in the periodic table is called a(n)

• family

• group

• octet

• period

The periodic law states that

• no two electrons with the same spin can be found in the same place in an atom

• the physical and chemical properties of the elements are functions of their atomic number.

• wave patterns of electrons repeat at regular intervals.

• the chemical properties of elements can be grouped according to periodicity.

• 2

• 13

• 14

• 15

When a carbon atom is in its ground state, how many electrons does it have in its outermost shell?

• 1

• 2

• 3

• 4

Which of the following elements is most similar in behavior to calcium?

• magnesium

• sodium

• sulfur

• chlorine

Answer explanation

elements in same group have similar chemical and physical properties

Which periodic group or family of elements is not correctly matched with its common family name?

• Group 2: alkaline- earth metals

• Group 3: alkali metals

• Group 17: halogens

• Group 18: noble gases

The electron configurations of main-group elements end in

• d and f orbitals.

• s and p orbitals.

• s and d orbitals.

• p and d orbitals.

Which of the following elements is a transition metal?

• calcium

• iron

• sodium

• sulfur

All the alkali metal elements are found on the periodic table in

• group 1

• group 2

• period 1

• period 2