Periodic Table Review

The rows of a periodic table are called periods.

• True

• False

Answer explanation

The statement is true. In the periodic table, the horizontal rows are indeed referred to as periods, while the vertical columns are called groups.

The columns of a periodic table are called what?

• Periods

• Groups

• Rows

• Elements

Answer explanation

The columns of a periodic table are called 'Groups'. Each group contains elements with similar properties, while 'Periods' refer to the rows. Therefore, the correct answer is 'Groups'.

Elements in the same period tend to have similar properties.

• True

• False

Answer explanation

Elements in the same period have different properties due to increasing atomic number and changing electron configurations. Therefore, they do not tend to have similar properties, making the statement false.

Elements in the same group tend to have similar properties.

• True

• False

Answer explanation

True. Elements in the same group of the periodic table have similar properties due to their similar electron configurations, which influence their chemical behavior and reactivity.

Mendeleev recognized the periodic law.

• True

• False

Answer explanation

Mendeleev is credited with formulating the periodic law, which states that the properties of elements are a periodic function of their atomic numbers. Therefore, the correct answer is True.

Which metal is an exception to being solid at room temperature?

• Gold

• Silver

• Mercury

• Iron

Answer explanation

Mercury is the only metal that is liquid at room temperature, while gold, silver, and iron are all solid. This unique property makes mercury an exception among metals.

Which group contains the noble gases?

• Group 1

• Group 2

• Group 18

• Group 17

Answer explanation

The noble gases, which are colorless, odorless, and inert, are found in Group 18 of the periodic table. This group includes helium, neon, argon, krypton, xenon, and radon, distinguishing them from other groups.

Which element is a liquid at room temperature?

• Cu

• Br

• Ar

• Am

Answer explanation

Bromine (Br) is the only element among the choices that is a liquid at room temperature, while copper (Cu) and americium (Am) are solids, and argon (Ar) is a gas.

What is the atomic number of Carbon?

• 6

• 12

• 14

• 16

Answer explanation

The atomic number of an element is defined as the number of protons in its nucleus. Carbon has 6 protons, which gives it an atomic number of 6. Therefore, the correct answer is 6.

Which element is in Group 2 and Period 3?

• Magnesium

• Calcium

• Beryllium

• Strontium

Answer explanation

Magnesium is the element located in Group 2 and Period 3 of the periodic table. Calcium is in Period 4, Beryllium is in Period 2, and Strontium is in Period 5, making Magnesium the correct choice.