Chemistry
Grade-9
Easy
Question
The atomic number of this Na is
- 23
- 11
- 22
- 16
Hint:
Atomic number of Na is 11.
The correct answer is: 11
- Mendeleev periodic table has 118 elements arranged in 18 groups and 7 periods.
- Moving from left to right atomic number increases by 1.
- Atomic number of sodium is 11.
Related Questions to study
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
Chemistry
Choose the correct statement.
- The vertical column in the periodic table is called a period.
- The vertical column in the periodic table is called a group.
- The horizontal row in the periodic table is not called a period.
- None of the above
Choose the correct statement.
ChemistryGrade-9
- The vertical column in the periodic table is called a period.
- The vertical column in the periodic table is called a group.
- The horizontal row in the periodic table is not called a period.
- None of the above
Chemistry
Which one is correct about Mendeleev's periodic law?
- Properties of elements are the periodic function of their atomic mass.
- Physical and chemical properties of elements are periodic functions of their atomic number.
- Physical properties of elements are the periodic functions of their atomic mass.
- Chemical properties of elements are the periodic function of their atomic number.
Which one is correct about Mendeleev's periodic law?
ChemistryGrade-9
- Properties of elements are the periodic function of their atomic mass.
- Physical and chemical properties of elements are periodic functions of their atomic number.
- Physical properties of elements are the periodic functions of their atomic mass.
- Chemical properties of elements are the periodic function of their atomic number.
Chemistry
Elements in the same group have __________.
- Similar Properties
- Same number of shells
- Similar Mass
- Same number of protons
Elements in the same group have __________.
ChemistryGrade-9
- Similar Properties
- Same number of shells
- Similar Mass
- Same number of protons
Chemistry
The vertical rows on the periodic table are called ___________.

- Periods
- Sentences
- Fences
- Groups
The vertical rows on the periodic table are called ___________.

ChemistryGrade-9
- Periods
- Sentences
- Fences
- Groups
Chemistry
Identify number 16 on the periodic table square below.

- Atomic mass
- Element name
- Chemical symbol
- Atomic number
Identify number 16 on the periodic table square below.

ChemistryGrade-9
- Atomic mass
- Element name
- Chemical symbol
- Atomic number
Chemistry
This group of elements sit along a stair step line on the periodic table and have properties of both metals and non-metals:
- Radioactive elements
- Halogens
- Transition metals
- Metalloids
This group of elements sit along a stair step line on the periodic table and have properties of both metals and non-metals:
ChemistryGrade-9
- Radioactive elements
- Halogens
- Transition metals
- Metalloids
Chemistry
Identify number 14 on the periodic table square below.

- Atomic mass
- Chemical symbol
- Atomic number
- Element name
Identify number 14 on the periodic table square below.

ChemistryGrade-9
- Atomic mass
- Chemical symbol
- Atomic number
- Element name
Chemistry
This group of elements have properties that are opposite those of metals:
- Halogens
- Non-metals
- Metalloids
- Radioactive elements
This group of elements have properties that are opposite those of metals:
ChemistryGrade-9
- Halogens
- Non-metals
- Metalloids
- Radioactive elements
Chemistry
Which of the following is true?
- Electrons attract neutrons
- Neutrons attract protons
- Protons attract electrons
- Electrons attract electrons
Which of the following is true?
ChemistryGrade-9
- Electrons attract neutrons
- Neutrons attract protons
- Protons attract electrons
- Electrons attract electrons
Chemistry
Metals are found ______________ of the periodic table.

- In the middle
- To the left
- To the right
- At the end
Metals are found ______________ of the periodic table.

ChemistryGrade-9
- In the middle
- To the left
- To the right
- At the end
Chemistry
__________ refers to the way a metal can be hammered or rolled into thin sheets.
- Luster
- Malleable
- Metalloids
- Solid
__________ refers to the way a metal can be hammered or rolled into thin sheets.
ChemistryGrade-9
- Luster
- Malleable
- Metalloids
- Solid