Chemistry
Grade-9
Easy
Question
Which of these is not a noble gas?
- Helium
- Nitrogen
- Argon
- Krypton
Hint:
Nitrogen
The correct answer is: Nitrogen
Nitrogen is not a noble gas as it belongs to group 15 and has 5 valence electrons while the others have full valence electrons.
Related Questions to study
Chemistry
The transition metals do not form colored compounds they appear either in white or grey color.
The transition metals do not form colored compounds they appear either in white or grey color.
ChemistryGrade-9
Chemistry
What is the name of this chemical family?
What is the name of this chemical family?
ChemistryGrade-9
Chemistry
Transition metals generally have higher densities and strength than alkali metals.
Transition metals generally have higher densities and strength than alkali metals.
ChemistryGrade-9
Chemistry
Which element belongs in the halogen family?
Which element belongs in the halogen family?
ChemistryGrade-9
Chemistry
Choose the correct statement that defines transition elements.
Choose the correct statement that defines transition elements.
ChemistryGrade-9
Chemistry
Which chemical family is highly reactive and exists in all three states of matter at room temperature?
Which chemical family is highly reactive and exists in all three states of matter at room temperature?
ChemistryGrade-9
Chemistry
The image shows information about the element sodium. What is the row of letters and numbers at the bottom called?
The image shows information about the element sodium. What is the row of letters and numbers at the bottom called?
ChemistryGrade-9
Chemistry
Why are the elements in Group 8A (18) called Noble gases?
Why are the elements in Group 8A (18) called Noble gases?
ChemistryGrade-9
Chemistry
All of the following are chemical families EXCEPT ___.
All of the following are chemical families EXCEPT ___.
ChemistryGrade-9
Chemistry
Besides the symbols and names of elements, what other information is found on the Periodic Table?
Besides the symbols and names of elements, what other information is found on the Periodic Table?
ChemistryGrade-9
Chemistry
Hydrogen is a family all by itself. It tends to behave like
Hydrogen is a family all by itself. It tends to behave like
Hydrogen is a family all by itself. It tends to behave like
Hydrogen is a family all by itself. It tends to behave like
ChemistryGrade-9
Chemistry
How many valence electrons does Phosphorus Have?
How many valence electrons does Phosphorus Have?
ChemistryGrade-9
Chemistry
How many valence electrons does Potassium Have?
How many valence electrons does Potassium Have?
ChemistryGrade-9
Chemistry
How many valence electrons does Aluminum Have?
How many valence electrons does Aluminum Have?
ChemistryGrade-9
Chemistry
Which alloy does not contain copper?
Which alloy does not contain copper?
ChemistryGrade-9
