Chemistry
Grade-9
Easy
Question
Elements in a period
- Are arranged alphabetically
- Have identical properties
- Belong to the same family
- Have the same number of electron shells
Hint:
Elements in a period have same number of electron energy levels.
The correct answer is: Have the same number of electron shells
- Elements in a period have same number of electron shells.
- From left to right in a period atomic number increases by 1.
- From left to right metallic character decreases.
Related Questions to study
Chemistry
Choose the incorrect statement about the trends in the properties of the elements of a period going from left to right from the following statements.
- The oxides become more acidic.
- The elements become less metallic.
- The number of valence electrons increases.
- Atoms start to lose their electrons more easily.
Choose the incorrect statement about the trends in the properties of the elements of a period going from left to right from the following statements.
ChemistryGrade-9
- The oxides become more acidic.
- The elements become less metallic.
- The number of valence electrons increases.
- Atoms start to lose their electrons more easily.
Chemistry
Columns of the periodic table are called
- Periods
- Groups
- Fences
- Metals
Columns of the periodic table are called
ChemistryGrade-9
- Periods
- Groups
- Fences
- Metals
Chemistry
Which elements have the most similar chemical properties?
- K and Na
- K and Ca
- K and Cl
- K and S
Which elements have the most similar chemical properties?
ChemistryGrade-9
- K and Na
- K and Ca
- K and Cl
- K and S
Chemistry
Each element is unique based on its number of protons, also known as the
- Atomic mass
- Valence number
- Atomic symbol
- Atomic number
Each element is unique based on its number of protons, also known as the
ChemistryGrade-9
- Atomic mass
- Valence number
- Atomic symbol
- Atomic number
Chemistry
If an atom had the same properties as fluorine (F), it would probably be located in
- Period 1
- Period 2
- Group 2
- Group 17
If an atom had the same properties as fluorine (F), it would probably be located in
ChemistryGrade-9
- Period 1
- Period 2
- Group 2
- Group 17
Chemistry
Which among these is a halogen?
- Helium
- Chlorine
- Oxygen
- Neptune
Which among these is a halogen?
ChemistryGrade-9
- Helium
- Chlorine
- Oxygen
- Neptune
Chemistry
Which color on the image of the periodic table corresponds with the noble gases?

- Red
- Black
- Blue
- Orange
Which color on the image of the periodic table corresponds with the noble gases?

ChemistryGrade-9
- Red
- Black
- Blue
- Orange
Chemistry
What is the name given to the last group in the periodic table?
- Halogens
- Alkali metals
- Noble gases
- Pnicogens
What is the name given to the last group in the periodic table?
ChemistryGrade-9
- Halogens
- Alkali metals
- Noble gases
- Pnicogens
Chemistry
What information does the mass number convey?
- The number of electrons and protons.
- The number of neutrons.
- The number of protons and neutrons.
- The number of protons.
What information does the mass number convey?
ChemistryGrade-9
- The number of electrons and protons.
- The number of neutrons.
- The number of protons and neutrons.
- The number of protons.
Chemistry
How many neutrons are in this element?

- 79
- 197
- 118
- Cannot be determined
How many neutrons are in this element?

ChemistryGrade-9
- 79
- 197
- 118
- Cannot be determined
Chemistry
The atomic number of this Na is
- 23
- 11
- 22
- 16
The atomic number of this Na is
ChemistryGrade-9
- 23
- 11
- 22
- 16
Chemistry
What does in
, X is:
- Atomic mass
- Atomic number
- Element name
- Chemical symbol
What does in
, X is:
ChemistryGrade-9
- Atomic mass
- Atomic number
- Element name
- Chemical symbol
Chemistry
In the representation
, 32 is:
- Atomic mass
- Atomic number
- Element name
- Chemical symbol
In the representation
, 32 is:
ChemistryGrade-9
- Atomic mass
- Atomic number
- Element name
- Chemical symbol
Chemistry
What does in
, Z represent?
- Atomic mass
- Atomic number
- Element name
- Chemical symbol
What does in
, Z represent?
ChemistryGrade-9
- Atomic mass
- Atomic number
- Element name
- Chemical symbol
Chemistry
How many groups are there in the modern periodic table?
- 8
- 9
- 18
- 17
How many groups are there in the modern periodic table?
ChemistryGrade-9
- 8
- 9
- 18
- 17