Summative Quiz (Oct-Nov)

Which group on the periodic table contains the noble gases?

• Group 1

• Group 14

• Group 7

• Group 18

Answer explanation

The noble gases are found in Group 18 of the periodic table. This group includes elements like helium, neon, and argon, which are characterized by their lack of reactivity due to having a full valence shell.

Elements in Group 1 of the periodic table are known as:

• alkali metals

• noble gases

• transition metals

• alkaline earth metals

Answer explanation

Elements in Group 1 of the periodic table are called alkali metals. They are highly reactive and include lithium, sodium, and potassium, among others.

Which of the following elements is a halogen?

• Nitrogen

• Oxygen

• Carbon

• Chlorine

Answer explanation

Chlorine is a halogen, found in Group 17 of the periodic table. Nitrogen, oxygen, and carbon are not halogens; they belong to different groups. Therefore, the correct answer is Chlorine.

The alkaline earth metals belong to which group?

• Group 1

• Group 3

• Group 4

• Group 2

Answer explanation

The alkaline earth metals are found in Group 2 of the periodic table. This group includes elements like magnesium and calcium, which are characterized by having two electrons in their outermost shell.

Which element is in the same group as potassium (K)?

• Sodium (Na)

• Bromine (Br)

• Iron (Fe)

• Calcium (Ca)

Answer explanation

Sodium (Na) is in the same group as potassium (K) on the periodic table, both belonging to Group 1, the alkali metals. Bromine (Br) is a halogen, iron (Fe) is a transition metal, and calcium (Ca) is in Group 2.

Which of the following elements would be the least reactive?

• Chlorine

• Helium

• Sodium

• Oxygen

Answer explanation

Helium is a noble gas with a full outer electron shell, making it very stable and unreactive. In contrast, chlorine, sodium, and oxygen are more reactive due to their incomplete electron configurations.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

__________is the the least reactive group on the periodic table.

Answer explanation

Noble Gases, also known as Inert Gases, are the least reactive group on the periodic table due to their full valence electron shells, making them stable and unlikely to form chemical bonds.

What is the group in red called?

• Transition Metals

• Inert Gases

• Halogens

• Alkaline-Earth Metals

Answer explanation

The group in red refers to the Transition Metals, which are located in the central block of the periodic table. They are known for their ability to form various oxidation states and complex ions.

Tags

NGSS.HS-PS1-1

The Lewis dot structure for oxygen (O) has how many dots?

• 6

• 8

• 2

• 4

Answer explanation

Oxygen (O) has 6 valence electrons, which are represented as dots in its Lewis dot structure. Each dot corresponds to a valence electron, confirming that the correct answer is 6.

In a Lewis structure, the dots around an element represent

• protons

• valence electrons

• neutrons

• bonding pairs

Answer explanation

In a Lewis structure, the dots around an element represent valence electrons, which are the outermost electrons involved in bonding. Protons and neutrons are not represented by dots; they are found in the nucleus.